package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)
var out = bufio.NewWriter(os.Stdout)

func main() {
	/*/TODO:!!!!!!!テスト用!!!!!!!!!
	sc = bufio.NewScanner(strings.NewReader(`

		`))
	//TODO:!!!!!!!テスト用!!!!!!!!!*/

	buf := make([]byte, 1024*1024)
	sc.Buffer(buf, bufio.MaxScanTokenSize)
	sc.Split(bufio.ScanWords)
	defer out.Flush() // !!!!caution!!!! you must use Fprint(out, ) not Print()
	/* --- code --- */

	x := nextInt()
	p := []int{2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157,
		163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347,
		349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547,
		557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751,
		757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977,
		983, 991, 997, 1009, 1013, 1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069, 1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151, 1153,
		1163, 1171, 1181, 1187, 1193, 1201, 1213, 1217, 1223, 1229, 1231, 1237, 1249, 1259, 1277, 1279, 1283, 1289, 1291, 1297, 1301, 1303, 1307, 1319, 1321,
		1327, 1361, 1367, 1373, 1381, 1399, 1409, 1423, 1427, 1429, 1433, 1439, 1447, 1451, 1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493, 1499, 1511, 1523,
		1531, 1543, 1549, 1553, 1559, 1567, 1571, 1579, 1583, 1597, 1601, 1607, 1609, 1613, 1619, 1621, 1627, 1637, 1657, 1663, 1667, 1669, 1693, 1697, 1699,
		1709, 1721, 1723, 1733, 1741, 1747, 1753, 1759, 1777, 1783, 1787, 1789, 1801, 1811, 1823, 1831, 1847, 1861, 1867, 1871, 1873, 1877, 1879, 1889, 1901,
		1907, 1913, 1931, 1933, 1949, 1951, 1973, 1979, 1987, 1993, 1997, 1999, 2003, 2011, 2017, 2027, 2029, 2039, 2053, 2063, 2069, 2081, 2083, 2087, 2089, 2099, 2111, 2113, 2129, 2131, 2137, 2141, 2143, 2153, 2161, 2179, 2203, 2207, 2213, 2221, 2237, 2239, 2243, 2251, 2267, 2269, 2273, 2281, 2287, 2293, 2297, 2309, 2311, 2333, 2339, 2341, 2347, 2351, 2357, 2371, 2377, 2381, 2383, 2389, 2393, 2399, 2411, 2417, 2423, 2437, 2441, 2447, 2459, 2467, 2473, 2477, 2503, 2521, 2531, 2539, 2543, 2549, 2551, 2557, 2579, 2591, 2593, 2609, 2617, 2621, 2633, 2647, 2657, 2659, 2663, 2671, 2677, 2683, 2687, 2689, 2693, 2699, 2707, 2711, 2713, 2719, 2729, 2731, 2741, 2749, 2753, 2767, 2777, 2789, 2791, 2797, 2801, 2803, 2819, 2833, 2837, 2843, 2851, 2857, 2861, 2879, 2887, 2897, 2903, 2909, 2917, 2927, 2939, 2953, 2957, 2963, 2969, 2971, 2999, 3001, 3011, 3019, 3023, 3037, 3041, 3049, 3061, 3067, 3079, 3083, 3089, 3109, 3119, 3121, 3137, 3163, 3167, 3169, 3181, 3187, 3191, 3203, 3209, 3217, 3221, 3229, 3251, 3253, 3257, 3259, 3271, 3299, 3301, 3307, 3313, 3319, 3323, 3329, 3331, 3343, 3347, 3359, 3361, 3371, 3373, 3389, 3391, 3407, 3413, 3433, 3449, 3457, 3461, 3463, 3467, 3469, 3491, 3499, 3511, 3517, 3527, 3529, 3533, 3539, 3541, 3547, 3557, 3559, 3571, 3581, 3583, 3593, 3607, 3613, 3617, 3623, 3631, 3637, 3643, 3659, 3671, 3673, 3677, 3691, 3697, 3701, 3709, 3719, 3727, 3733, 3739, 3761, 3767, 3769, 3779, 3793, 3797, 3803, 3821, 3823, 3833, 3847, 3851, 3853, 3863, 3877, 3881, 3889, 3907, 3911, 3917, 3919, 3923, 3929, 3931, 3943, 3947, 3967, 3989, 4001, 4003, 4007, 4013, 4019, 4021, 4027, 4049, 4051, 4057, 4073, 4079, 4091, 4093, 4099, 4111, 4127, 4129, 4133, 4139, 4153, 4157, 4159, 4177, 4201, 4211, 4217, 4219, 4229, 4231, 4241, 4243, 4253, 4259, 4261, 4271, 4273, 4283, 4289, 4297, 4327, 4337, 4339, 4349, 4357, 4363, 4373, 4391, 4397, 4409, 4421, 4423, 4441, 4447, 4451, 4457, 4463, 4481, 4483, 4493, 4507, 4513, 4517, 4519, 4523, 4547, 4549, 4561, 4567, 4583, 4591, 4597, 4603, 4621, 4637, 4639, 4643, 4649, 4651, 4657, 4663, 4673, 4679, 4691, 4703, 4721, 4723, 4729, 4733, 4751, 4759, 4783, 4787, 4789, 4793, 4799, 4801, 4813, 4817, 4831, 4861, 4871, 4877, 4889, 4903, 4909, 4919, 4931, 4933, 4937, 4943, 4951, 4957, 4967, 4969, 4973, 4987, 4993, 4999, 5003, 5009, 5011, 5021, 5023, 5039, 5051, 5059, 5077, 5081, 5087, 5099, 5101, 5107, 5113, 5119, 5147, 5153, 5167, 5171, 5179, 5189, 5197, 5209, 5227, 5231, 5233, 5237, 5261, 5273, 5279, 5281, 5297, 5303, 5309, 5323, 5333, 5347, 5351, 5381, 5387, 5393, 5399, 5407, 5413, 5417, 5419, 5431, 5437, 5441, 5443, 5449, 5471, 5477, 5479, 5483, 5501, 5503, 5507, 5519, 5521, 5527, 5531, 5557, 5563, 5569, 5573, 5581, 5591, 5623, 5639, 5641, 5647, 5651, 5653, 5657, 5659, 5669, 5683, 5689, 5693, 5701, 5711, 5717, 5737, 5741, 5743, 5749, 5779, 5783, 5791, 5801, 5807, 5813, 5821, 5827, 5839, 5843, 5849, 5851, 5857, 5861, 5867, 5869, 5879, 5881, 5897, 5903, 5923, 5927, 5939, 5953, 5981, 5987, 6007, 6011, 6029, 6037, 6043, 6047, 6053, 6067, 6073, 6079, 6089, 6091, 6101, 6113, 6121, 6131, 6133, 6143, 6151, 6163, 6173, 6197, 6199, 6203, 6211, 6217, 6221, 6229, 6247, 6257, 6263, 6269, 6271, 6277, 6287, 6299, 6301, 6311, 6317, 6323, 6329, 6337, 6343, 6353, 6359, 6361, 6367, 6373, 6379, 6389, 6397, 6421, 6427, 6449, 6451, 6469, 6473, 6481, 6491, 6521, 6529, 6547, 6551, 6553, 6563, 6569, 6571, 6577, 6581, 6599, 6607, 6619, 6637, 6653, 6659, 6661, 6673, 6679, 6689, 6691, 6701, 6703, 6709, 6719, 6733, 6737, 6761, 6763, 6779, 6781, 6791, 6793, 6803, 6823, 6827, 6829, 6833, 6841, 6857, 6863, 6869, 6871, 6883, 6899, 6907, 6911, 6917, 6947, 6949, 6959, 6961, 6967, 6971, 6977, 6983, 6991, 6997, 7001, 7013, 7019, 7027, 7039, 7043, 7057, 7069, 7079, 7103, 7109, 7121, 7127, 7129, 7151, 7159, 7177, 7187, 7193, 7207, 7211, 7213, 7219, 7229, 7237, 7243, 7247, 7253, 7283, 7297, 7307, 7309, 7321, 7331, 7333, 7349, 7351, 7369, 7393, 7411, 7417, 7433, 7451, 7457, 7459, 7477, 7481, 7487, 7489, 7499, 7507, 7517, 7523, 7529, 7537, 7541, 7547, 7549, 7559, 7561, 7573, 7577, 7583, 7589, 7591, 7603, 7607, 7621, 7639, 7643, 7649, 7669, 7673, 7681, 7687, 7691, 7699, 7703, 7717, 7723, 7727, 7741, 7753, 7757, 7759, 7789, 7793, 7817, 7823, 7829, 7841, 7853, 7867, 7873, 7877, 7879, 7883, 7901, 7907, 7919, 7927, 7933, 7937, 7949, 7951, 7963, 7993, 8009, 8011, 8017, 8039, 8053, 8059, 8069, 8081, 8087, 8089, 8093, 8101, 8111, 8117, 8123, 8147, 8161, 8167, 8171, 8179, 8191, 8209, 8219, 8221, 8231, 8233, 8237, 8243, 8263, 8269, 8273, 8287, 8291, 8293, 8297, 8311, 8317, 8329, 8353, 8363, 8369, 8377, 8387, 8389, 8419, 8423, 8429, 8431, 8443, 8447, 8461, 8467, 8501, 8513, 8521, 8527, 8537, 8539, 8543, 8563, 8573, 8581, 8597, 8599, 8609, 8623, 8627, 8629, 8641, 8647, 8663, 8669, 8677, 8681, 8689, 8693, 8699, 8707, 8713, 8719, 8731, 8737, 8741, 8747, 8753, 8761, 8779, 8783, 8803, 8807, 8819, 8821, 8831, 8837, 8839, 8849, 8861, 8863, 8867, 8887, 8893, 8923, 8929, 8933, 8941, 8951, 8963, 8969, 8971, 8999, 9001, 9007, 9011, 9013, 9029, 9041, 9043, 9049, 9059, 9067, 9091, 9103, 9109, 9127, 9133, 9137, 9151, 9157, 9161, 9173, 9181, 9187, 9199, 9203, 9209, 9221, 9227, 9239, 9241, 9257, 9277, 9281, 9283, 9293, 9311, 9319, 9323, 9337, 9341, 9343, 9349, 9371, 9377, 9391, 9397, 9403, 9413, 9419, 9421, 9431, 9433, 9437, 9439, 9461, 9463, 9467, 9473, 9479, 9491, 9497, 9511, 9521, 9533, 9539, 9547, 9551, 9587, 9601, 9613, 9619, 9623, 9629, 9631, 9643, 9649, 9661, 9677, 9679, 9689, 9697, 9719, 9721, 9733, 9739, 9743, 9749, 9767, 9769, 9781, 9787, 9791, 9803, 9811, 9817, 9829, 9833, 9839, 9851, 9857, 9859, 9871, 9883, 9887, 9901, 9907, 9923, 9929, 9931, 9941, 9949, 9967, 9973, 10007, 10009, 10037, 10039, 10061, 10067, 10069, 10079, 10091, 10093, 10099, 10103, 10111, 10133, 10139, 10141, 10151, 10159, 10163, 10169, 10177, 10181, 10193, 10211, 10223, 10243, 10247, 10253, 10259, 10267, 10271, 10273, 10289, 10301, 10303, 10313, 10321, 10331, 10333, 10337, 10343, 10357, 10369, 10391, 10399, 10427, 10429, 10433, 10453, 10457, 10459, 10463, 10477, 10487, 10499, 10501, 10513, 10529, 10531, 10559, 10567, 10589, 10597, 10601, 10607, 10613, 10627, 10631, 10639, 10651, 10657, 10663, 10667, 10687, 10691, 10709, 10711, 10723, 10729, 10733, 10739, 10753, 10771, 10781, 10789, 10799, 10831, 10837, 10847, 10853, 10859, 10861, 10867, 10883, 10889, 10891, 10903, 10909, 10937, 10939, 10949, 10957, 10973, 10979, 10987, 10993, 11003, 11027, 11047, 11057, 11059, 11069, 11071, 11083, 11087, 11093, 11113, 11117, 11119, 11131, 11149, 11159, 11161, 11171, 11173, 11177, 11197, 11213, 11239, 11243, 11251, 11257, 11261, 11273, 11279, 11287, 11299, 11311, 11317, 11321, 11329, 11351, 11353, 11369, 11383, 11393, 11399, 11411, 11423, 11437, 11443, 11447, 11467, 11471, 11483, 11489, 11491, 11497, 11503, 11519, 11527, 11549, 11551, 11579, 11587, 11593, 11597, 11617, 11621, 11633, 11657, 11677, 11681, 11689, 11699, 11701, 11717, 11719, 11731, 11743, 11777, 11779, 11783, 11789, 11801, 11807, 11813, 11821, 11827, 11831, 11833, 11839, 11863, 11867, 11887, 11897, 11903, 11909, 11923, 11927, 11933, 11939, 11941, 11953, 11959, 11969, 11971, 11981, 11987, 12007, 12011, 12037, 12041, 12043, 12049, 12071, 12073, 12097, 12101, 12107, 12109, 12113, 12119, 12143, 12149, 12157, 12161, 12163, 12197, 12203, 12211, 12227, 12239, 12241, 12251, 12253, 12263, 12269, 12277, 12281, 12289, 12301, 12323, 12329, 12343, 12347, 12373, 12377, 12379, 12391, 12401, 12409, 12413, 12421, 12433, 12437, 12451, 12457, 12473, 12479, 12487, 12491, 12497, 12503, 12511, 12517, 12527, 12539, 12541, 12547, 12553, 12569, 12577, 12583, 12589, 12601, 12611, 12613, 12619, 12637, 12641, 12647, 12653, 12659, 12671, 12689, 12697, 12703, 12713, 12721, 12739, 12743, 12757, 12763, 12781, 12791, 12799, 12809, 12821, 12823, 12829, 12841, 12853, 12889, 12893, 12899, 12907, 12911, 12917, 12919, 12923, 12941, 12953, 12959, 12967, 12973, 12979, 12983, 13001, 13003, 13007, 13009, 13033, 13037, 13043, 13049, 13063, 13093, 13099, 13103, 13109, 13121, 13127, 13147, 13151, 13159, 13163, 13171, 13177, 13183, 13187, 13217, 13219, 13229, 13241, 13249, 13259, 13267, 13291, 13297, 13309, 13313, 13327, 13331, 13337, 13339, 13367, 13381, 13397, 13399, 13411, 13417, 13421, 13441, 13451, 13457, 13463, 13469, 13477, 13487, 13499, 13513, 13523, 13537, 13553, 13567, 13577, 13591, 13597, 13613, 13619, 13627, 13633, 13649, 13669, 13679, 13681, 13687, 13691, 13693, 13697, 13709, 13711, 13721, 13723, 13729, 13751, 13757, 13759, 13763, 13781, 13789, 13799, 13807, 13829, 13831, 13841, 13859, 13873, 13877, 13879, 13883, 13901, 13903, 13907, 13913, 13921, 13931, 13933, 13963, 13967, 13997, 13999, 14009, 14011, 14029, 14033, 14051, 14057, 14071, 14081, 14083, 14087, 14107, 14143, 14149, 14153, 14159, 14173, 14177, 14197, 14207, 14221, 14243, 14249, 14251, 14281, 14293, 14303, 14321, 14323, 14327, 14341, 14347, 14369, 14387, 14389, 14401, 14407, 14411, 14419, 14423, 14431, 14437, 14447, 14449, 14461, 14479, 14489, 14503, 14519, 14533, 14537, 14543, 14549, 14551, 14557, 14561, 14563, 14591, 14593, 14621, 14627, 14629, 14633, 14639, 14653, 14657, 14669, 14683, 14699, 14713, 14717, 14723, 14731, 14737, 14741, 14747, 14753, 14759, 14767, 14771, 14779, 14783, 14797, 14813, 14821, 14827, 14831, 14843, 14851, 14867, 14869, 14879, 14887, 14891, 14897, 14923, 14929, 14939, 14947, 14951, 14957, 14969, 14983, 15013, 15017, 15031, 15053, 15061, 15073, 15077, 15083, 15091, 15101, 15107, 15121, 15131, 15137, 15139, 15149, 15161, 15173, 15187, 15193, 15199, 15217, 15227, 15233, 15241, 15259, 15263, 15269, 15271, 15277, 15287, 15289, 15299, 15307, 15313, 15319, 15329, 15331, 15349, 15359, 15361, 15373, 15377, 15383, 15391, 15401, 15413, 15427, 15439, 15443, 15451, 15461, 15467, 15473, 15493, 15497, 15511, 15527, 15541, 15551, 15559, 15569, 15581, 15583, 15601, 15607, 15619, 15629, 15641, 15643, 15647, 15649, 15661, 15667, 15671, 15679, 15683, 15727, 15731, 15733, 15737, 15739, 15749, 15761, 15767, 15773, 15787, 15791, 15797, 15803, 15809, 15817, 15823, 15859, 15877, 15881, 15887, 15889, 15901, 15907, 15913, 15919, 15923, 15937, 15959, 15971, 15973, 15991, 16001, 16007, 16033, 16057, 16061, 16063, 16067, 16069, 16073, 16087, 16091, 16097, 16103, 16111, 16127, 16139, 16141, 16183, 16187, 16189, 16193, 16217, 16223, 16229, 16231, 16249, 16253, 16267, 16273, 16301, 16319, 16333, 16339, 16349, 16361, 16363, 16369, 16381, 16411, 16417, 16421, 16427, 16433, 16447, 16451, 16453, 16477, 16481, 16487, 16493, 16519, 16529, 16547, 16553, 16561, 16567, 16573, 16603, 16607, 16619, 16631, 16633, 16649, 16651, 16657, 16661, 16673, 16691, 16693, 16699, 16703, 16729, 16741, 16747, 16759, 16763, 16787, 16811, 16823, 16829, 16831, 16843, 16871, 16879, 16883, 16889, 16901, 16903, 16921, 16927, 16931, 16937, 16943, 16963, 16979, 16981, 16987, 16993, 17011, 17021, 17027, 17029, 17033, 17041, 17047, 17053, 17077, 17093, 17099, 17107, 17117, 17123, 17137, 17159, 17167, 17183, 17189, 17191, 17203, 17207, 17209, 17231, 17239, 17257, 17291, 17293, 17299, 17317, 17321, 17327, 17333, 17341, 17351, 17359, 17377, 17383, 17387, 17389, 17393, 17401, 17417, 17419, 17431, 17443, 17449, 17467, 17471, 17477, 17483, 17489, 17491, 17497, 17509, 17519, 17539, 17551, 17569, 17573, 17579, 17581, 17597, 17599, 17609, 17623, 17627, 17657, 17659, 17669, 17681, 17683, 17707, 17713, 17729, 17737, 17747, 17749, 17761, 17783, 17789, 17791, 17807, 17827, 17837, 17839, 17851, 17863, 17881, 17891, 17903, 17909, 17911, 17921, 17923, 17929, 17939, 17957, 17959, 17971, 17977, 17981, 17987, 17989, 18013, 18041, 18043, 18047, 18049, 18059, 18061, 18077, 18089, 18097, 18119, 18121, 18127, 18131, 18133, 18143, 18149, 18169, 18181, 18191, 18199, 18211, 18217, 18223, 18229, 18233, 18251, 18253, 18257, 18269, 18287, 18289, 18301, 18307, 18311, 18313, 18329, 18341, 18353, 18367, 18371, 18379, 18397, 18401, 18413, 18427, 18433, 18439, 18443,
		18451, 18457, 18461, 18481, 18493, 18503, 18517, 18521, 18523, 18539, 18541, 18553, 18583, 18587, 18593, 18617, 18637, 18661, 18671, 18679, 18691, 18701, 18713, 18719, 18731, 18743, 18749, 18757, 18773, 18787, 18793, 18797, 18803, 18839, 18859, 18869, 18899, 18911, 18913, 18917, 18919, 18947, 18959, 18973, 18979, 19001, 19009, 19013, 19031, 19037, 19051, 19069, 19073, 19079, 19081, 19087, 19121, 19139, 19141, 19157, 19163, 19181, 19183, 19207, 19211, 19213, 19219, 19231, 19237, 19249, 19259, 19267, 19273, 19289, 19301, 19309, 19319, 19333, 19373, 19379, 19381, 19387, 19391, 19403, 19417, 19421, 19423, 19427, 19429, 19433, 19441, 19447, 19457, 19463, 19469, 19471, 19477, 19483, 19489, 19501, 19507, 19531, 19541, 19543, 19553, 19559, 19571, 19577, 19583, 19597, 19603, 19609, 19661, 19681, 19687, 19697, 19699, 19709, 19717, 19727, 19739, 19751, 19753, 19759, 19763, 19777, 19793, 19801, 19813, 19819, 19841, 19843, 19853, 19861, 19867, 19889, 19891, 19913, 19919, 19927, 19937, 19949, 19961, 19963, 19973, 19979, 19991, 19993, 19997, 20011, 20021, 20023, 20029, 20047, 20051, 20063, 20071, 20089, 20101, 20107, 20113, 20117, 20123, 20129, 20143, 20147, 20149, 20161, 20173, 20177, 20183, 20201, 20219, 20231, 20233, 20249, 20261, 20269, 20287, 20297, 20323, 20327, 20333, 20341, 20347, 20353, 20357, 20359, 20369, 20389, 20393, 20399, 20407, 20411, 20431, 20441, 20443, 20477, 20479, 20483, 20507, 20509, 20521, 20533, 20543, 20549, 20551, 20563, 20593, 20599, 20611, 20627, 20639, 20641, 20663, 20681, 20693, 20707, 20717, 20719, 20731, 20743, 20747, 20749, 20753, 20759, 20771, 20773, 20789, 20807, 20809, 20849, 20857, 20873, 20879, 20887, 20897, 20899, 20903, 20921, 20929, 20939, 20947, 20959, 20963, 20981, 20983, 21001, 21011, 21013, 21017, 21019, 21023, 21031, 21059, 21061, 21067, 21089, 21101, 21107, 21121, 21139, 21143, 21149, 21157, 21163, 21169, 21179, 21187, 21191, 21193, 21211, 21221, 21227, 21247, 21269, 21277, 21283, 21313, 21317, 21319, 21323, 21341, 21347, 21377, 21379, 21383, 21391, 21397, 21401, 21407, 21419, 21433, 21467, 21481, 21487, 21491, 21493, 21499, 21503, 21517, 21521, 21523, 21529, 21557, 21559, 21563, 21569, 21577, 21587, 21589, 21599, 21601, 21611, 21613, 21617, 21647, 21649, 21661, 21673, 21683, 21701, 21713, 21727, 21737, 21739, 21751, 21757, 21767, 21773, 21787, 21799, 21803, 21817, 21821, 21839, 21841, 21851, 21859, 21863, 21871, 21881, 21893, 21911, 21929, 21937, 21943, 21961, 21977, 21991, 21997, 22003, 22013, 22027, 22031, 22037, 22039, 22051, 22063, 22067, 22073, 22079, 22091, 22093, 22109, 22111, 22123, 22129, 22133, 22147, 22153, 22157, 22159, 22171, 22189, 22193, 22229, 22247, 22259, 22271, 22273, 22277, 22279, 22283, 22291, 22303, 22307, 22343, 22349, 22367, 22369, 22381, 22391, 22397, 22409, 22433, 22441, 22447, 22453, 22469, 22481, 22483, 22501, 22511, 22531, 22541, 22543, 22549, 22567, 22571, 22573, 22613, 22619, 22621, 22637, 22639, 22643, 22651, 22669, 22679, 22691, 22697, 22699, 22709, 22717, 22721, 22727, 22739, 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		90697, 90703, 90709, 90731, 90749, 90787, 90793, 90803, 90821, 90823, 90833, 90841, 90847, 90863, 90887, 90901, 90907, 90911, 90917, 90931, 90947, 90971, 90977, 90989, 90997, 91009, 91019, 91033, 91079, 91081, 91097, 91099, 91121, 91127, 91129, 91139, 91141, 91151, 91153, 91159, 91163, 91183, 91193, 91199, 91229, 91237, 91243, 91249, 91253, 91283, 91291, 91297, 91303, 91309, 91331, 91367, 91369, 91373, 91381, 91387, 91393, 91397, 91411, 91423, 91433, 91453, 91457, 91459, 91463, 91493, 91499, 91513, 91529, 91541, 91571, 91573, 91577, 91583, 91591, 91621, 91631, 91639, 91673, 91691, 91703, 91711, 91733, 91753, 91757, 91771, 91781, 91801, 91807, 91811, 91813, 91823, 91837, 91841, 91867, 91873, 91909, 91921, 91939, 91943, 91951, 91957, 91961, 91967, 91969, 91997, 92003, 92009, 92033, 92041, 92051, 92077, 92083, 92107, 92111, 92119, 92143, 92153, 92173, 92177, 92179, 92189, 92203, 92219, 92221, 92227, 92233, 92237, 92243, 92251, 92269, 92297, 92311, 92317, 92333, 92347, 92353, 92357, 92363, 92369, 92377, 92381, 92383, 92387, 92399, 92401, 92413, 92419, 92431, 92459, 92461, 92467, 92479, 92489, 92503, 92507, 92551, 92557, 92567, 92569, 92581, 92593, 92623, 92627, 92639, 92641, 92647, 92657, 92669, 92671, 92681, 92683, 92693, 92699, 92707, 92717, 92723, 92737, 92753, 92761, 92767, 92779, 92789, 92791, 92801, 92809, 92821, 92831, 92849, 92857, 92861, 92863, 92867, 92893, 92899, 92921, 92927, 92941, 92951, 92957, 92959, 92987, 92993, 93001, 93047, 93053, 93059, 93077, 93083, 93089, 93097, 93103, 93113, 93131, 93133, 93139, 93151, 93169, 93179, 93187, 93199, 93229, 93239, 93241, 93251, 93253, 93257, 93263, 93281, 93283, 93287, 93307, 93319, 93323, 93329, 93337, 93371, 93377, 93383, 93407, 93419, 93427, 93463, 93479, 93481, 93487, 93491, 93493, 93497, 93503, 93523, 93529, 93553, 93557, 93559, 93563, 93581, 93601, 93607, 93629, 93637, 93683, 93701, 93703, 93719, 93739, 93761, 93763, 93787, 93809, 93811, 93827, 93851, 93871, 93887, 93889, 93893, 93901, 93911, 93913, 93923, 93937, 93941, 93949, 93967, 93971, 93979, 93983, 93997, 94007, 94009, 94033, 94049, 94057, 94063, 94079, 94099, 94109, 94111, 94117, 94121, 94151, 94153, 94169, 94201, 94207, 94219, 94229, 94253, 94261, 94273, 94291, 94307, 94309, 94321, 94327, 94331, 94343, 94349, 94351, 94379, 94397, 94399, 94421, 94427, 94433, 94439, 94441, 94447, 94463, 94477, 94483, 94513, 94529, 94531, 94541, 94543, 94547, 94559, 94561, 94573, 94583, 94597, 94603, 94613, 94621, 94649, 94651, 94687, 94693, 94709, 94723, 94727, 94747, 94771, 94777, 94781, 94789, 94793, 94811, 94819, 94823, 94837, 94841, 94847, 94849, 94873, 94889, 94903, 94907, 94933, 94949, 94951, 94961, 94993, 94999, 95003, 95009, 95021, 95027, 95063, 95071, 95083, 95087, 95089, 95093, 95101, 95107, 95111, 95131, 95143, 95153, 95177, 95189, 95191, 95203, 95213, 95219, 95231, 95233, 95239, 95257, 95261, 95267, 95273, 95279, 95287, 95311, 95317, 95327, 95339, 95369, 95383, 95393, 95401, 95413, 95419, 95429, 95441, 95443, 95461, 95467, 95471, 95479, 95483, 95507, 95527, 95531, 95539, 95549, 95561, 95569, 95581, 95597, 95603, 95617, 95621, 95629, 95633, 95651, 95701, 95707, 95713, 95717, 95723, 95731, 95737, 95747, 95773, 95783, 95789, 95791, 95801, 95803, 95813, 95819, 95857, 95869, 95873, 95881, 95891, 95911, 95917, 95923, 95929, 95947, 95957, 95959, 95971, 95987, 95989, 96001, 96013, 96017, 96043, 96053, 96059, 96079, 96097, 96137, 96149, 96157, 96167, 96179, 96181, 96199, 96211, 96221, 96223, 96233, 96259, 96263, 96269, 96281, 96289, 96293, 96323, 96329, 96331, 96337, 96353, 96377, 96401, 96419, 96431, 96443, 96451, 96457, 96461, 96469, 96479, 96487, 96493, 96497, 96517, 96527, 96553, 96557, 96581, 96587, 96589, 96601, 96643, 96661, 96667, 96671, 96697, 96703, 96731, 96737, 96739, 96749, 96757, 96763, 96769, 96779, 96787, 96797, 96799, 96821, 96823, 96827, 96847, 96851, 96857, 96893, 96907, 96911, 96931, 96953, 96959, 96973, 96979, 96989, 96997, 97001, 97003, 97007, 97021, 97039, 97073, 97081, 97103, 97117, 97127, 97151, 97157, 97159, 97169, 97171, 97177, 97187, 97213, 97231, 97241, 97259, 97283, 97301, 97303, 97327, 97367, 97369, 97373, 97379, 97381, 97387, 97397, 97423, 97429, 97441, 97453, 97459, 97463, 97499, 97501, 97511, 97523, 97547, 97549, 97553, 97561, 97571, 97577, 97579, 97583, 97607, 97609, 97613, 97649, 97651, 97673, 97687, 97711, 97729, 97771, 97777, 97787, 97789, 97813, 97829, 97841, 97843, 97847, 97849, 97859, 97861, 97871, 97879, 97883, 97919, 97927, 97931, 97943, 97961, 97967, 97973, 97987, 98009, 98011, 98017, 98041, 98047, 98057, 98081, 98101, 98123, 98129, 98143, 98179, 98207, 98213, 98221, 98227, 98251, 98257, 98269, 98297, 98299, 98317, 98321, 98323, 98327, 98347, 98369, 98377, 98387, 98389, 98407, 98411, 98419, 98429, 98443, 98453, 98459, 98467, 98473, 98479, 98491, 98507, 98519, 98533, 98543, 98561, 98563, 98573, 98597, 98621, 98627, 98639, 98641, 98663, 98669, 98689, 98711, 98713, 98717, 98729, 98731, 98737, 98773, 98779, 98801, 98807, 98809, 98837, 98849, 98867, 98869, 98873, 98887, 98893, 98897, 98899, 98909, 98911, 98927, 98929, 98939, 98947, 98953, 98963, 98981, 98993, 98999, 99013, 99017, 99023, 99041, 99053, 99079, 99083, 99089, 99103, 99109, 99119, 99131, 99133, 99137, 99139, 99149, 99173, 99181, 99191, 99223, 99233, 99241, 99251, 99257, 99259, 99277, 99289, 99317, 99347, 99349, 99367, 99371, 99377, 99391, 99397, 99401, 99409, 99431, 99439, 99469, 99487, 99497, 99523, 99527, 99529, 99551, 99559, 99563, 99571, 99577, 99581, 99607, 99611, 99623, 99643, 99661, 99667, 99679, 99689, 99707, 99709, 99713, 99719, 99721, 99733, 99761, 99767, 99787, 99793, 99809, 99817, 99823, 99829, 99833, 99839, 99859, 99871, 99877, 99881, 99901, 99907, 99923, 99929, 99961, 99971, 99989, 99991, 100003}

	ans := 0

	for i := 0; i < len(p); i++ {
		if x <= p[i] {
			ans = p[i]
			break
		}
	}

	//fmt.Fprintln(out, "[DEBUG]", d)
	fmt.Fprintln(out, ans)
}

//------------------------------------------------------------------------------

// -*-*-*-*-*-*-*-*-
// * I/O utilities *
// -*-*-*-*-*-*-*-*-

func next() string {
	sc.Scan()
	return sc.Text()
}

func nextInt() int {
	a, _ := strconv.Atoi(next())
	return a
}

func nextFloat64() float64 {
	a, _ := strconv.ParseFloat(next(), 64)
	return a
}

func nextInts(n int) []int {
	ret := make([]int, n)
	for i := 0; i < n; i++ {
		ret[i] = nextInt()
	}
	return ret
}
func nextFloats(n int) []float64 {
	ret := make([]float64, n)
	for i := 0; i < n; i++ {
		ret[i] = nextFloat64()
	}
	return ret
}
func nextStrings(n int) []string {
	ret := make([]string, n)
	for i := 0; i < n; i++ {
		ret[i] = next()
	}
	return ret
}

func chars(s string) []string {
	ret := make([]string, len([]rune(s)))
	for i, v := range []rune(s) {
		ret[i] = string(v)
	}
	return ret
}


package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"strconv"
)

func main() {
	var x int
	sc.nextInts(&x)
	for i := x; i < 1e6; i++ {
		var ng bool
		for j := 2; j <= int(math.Sqrt(float64(i))); j++ {
			if i%j == 0 {
				ng = true
				break
			}
		}
		if !ng {
			fmt.Println(i)
			return
		}
	}
}

type scanner struct {
	sc *bufio.Scanner
}

var sc *scanner

func init() {
	s := bufio.NewScanner(os.Stdin)
	s.Split(bufio.ScanWords)
	sc = &scanner{sc: s}
}

func (s *scanner) nextInts(ints ...*int) {
	for i := range ints {
		s.sc.Scan()
		*ints[i], _ = strconv.Atoi(s.sc.Text())
	}
}

func (s *scanner) nextStr() string {
	s.sc.Scan()
	return s.sc.Text()
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func abs(a int) int {
	if a < 0 {
		return -a
	}
	return a
}


package main

import "fmt"

func main() {
	var x int
	fmt.Scan(&x)

	for i := x; ; i++ {
		if isPrime(i) {
			fmt.Println(i)
			return
		}
	}
}

func isPrime(n int) bool {
	for i := 2; i*i <= n; i++ {
		if n%i == 0 {
			return false
		}
	}
	return true
}


package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"sort"
	"strconv"
	"strings"
)

func main() {
	scan_init()
	x := scanInt()
	max := int(2*math.Pow(10,5))
	memo := toKeys(allSosu(max))
	for i:= 0; i<len(memo); i++ {
		if memo[i] > x {
			fmt.Println(memo[i])
			break
		}
	}
}
func toKeys (memo map[int]bool)[]int{
	k := 0
	output := make([]int, len(memo))
	for i,_ := range memo {
		output[k] = i
		k++
	}
	sort.Ints(output)
	return output
}
func allSosu(max int) map[int]bool{
	// max値までの素数群を返す
	// 計算量logmax*logmax
	output := map[int]bool{}
	furui := make([]int, max+1)
	for i:= 2; i*i<=max; i++ {
		if furui[i] > 0 {
			continue
		}
		for j:=i+i; j<=max; j += i{
			furui[j]++
		}
	}
	for i:=2; i<=max; i++ {
		if furui[i] == 0 {
			output[i] = true
		}
	}
	return output
}
var sc = bufio.NewScanner(os.Stdin)

func scan_init() {
	sc.Split(bufio.ScanWords)
}
func scanInt() int {
	sc.Scan()
	i, _ := strconv.Atoi(sc.Text())
	return i
}
func scan() string {
	sc.Scan()
	return sc.Text()
}

var rdr = bufio.NewReaderSize(os.Stdin, 200000)

func readLine() string {
	buf := make([]byte, 0, 200000)
	for {
		l, p, e := rdr.ReadLine()
		if e != nil {
			panic(e)
		}
		buf = append(buf, l...)
		if !p {
			break
		}
	}
	return string(buf)
}
func readLineToNumber() int {
	S := readLine()
	number, _ := strconv.Atoi(S)
	return number
}
func readLineToSlice() []string {
	S := readLine()
	list := strings.Split(S, "")
	return list
}
func readLineToNumberSlice(memo map[string]int) []int {
	// err時は-1を代入
	S := readLine()
	intList := make([]int, len(S))
	for i := 0; i < len(S); i++ {
		if val, ok := memo[string(S[i])]; ok {
			intList[i] = val
		} else {
			intList[i] = -1
		}
	}
	return intList
}


package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"sort"
	"strconv"
	"strings"
)

func main() {
	scan_init()
	x := scanInt()
	max := int(math.Pow(10,9))
	memo := toKeys(allSosu(max))
	for i:= 0; i<len(memo); i++ {
		if memo[i] > x {
			fmt.Println(memo[i])
			break
		}
	}
}
func toKeys (memo map[int]bool)[]int{
	k := 0
	output := make([]int, len(memo))
	for i,_ := range memo {
		output[k] = i
		k++
	}
	sort.Ints(output)
	return output
}
func allSosu(max int) map[int]bool{
	// max値までの素数群を返す
	// 計算量logmax*logmax
	output := map[int]bool{}
	furui := make([]int, max+1)
	for i:= 2; i*i<=max; i++ {
		if furui[i] > 0 {
			continue
		}
		for j:=i+i; j<=max; j += i{
			furui[j]++
		}
	}
	for i:=2; i<=max; i++ {
		if furui[i] == 0 {
			output[i] = true
		}
	}
	return output
}
var sc = bufio.NewScanner(os.Stdin)

func scan_init() {
	sc.Split(bufio.ScanWords)
}
func scanInt() int {
	sc.Scan()
	i, _ := strconv.Atoi(sc.Text())
	return i
}
func scan() string {
	sc.Scan()
	return sc.Text()
}

var rdr = bufio.NewReaderSize(os.Stdin, 200000)

func readLine() string {
	buf := make([]byte, 0, 200000)
	for {
		l, p, e := rdr.ReadLine()
		if e != nil {
			panic(e)
		}
		buf = append(buf, l...)
		if !p {
			break
		}
	}
	return string(buf)
}
func readLineToNumber() int {
	S := readLine()
	number, _ := strconv.Atoi(S)
	return number
}
func readLineToSlice() []string {
	S := readLine()
	list := strings.Split(S, "")
	return list
}
func readLineToNumberSlice(memo map[string]int) []int {
	// err時は-1を代入
	S := readLine()
	intList := make([]int, len(S))
	for i := 0; i < len(S); i++ {
		if val, ok := memo[string(S[i])]; ok {
			intList[i] = val
		} else {
			intList[i] = -1
		}
	}
	return intList
}


package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"sort"
	"strconv"
	"strings"
)

func main() {
	scan_init()
	x := scanInt()
	max := int(math.Pow(10,7))
	memo := toKeys(allSosu(max))
	for i:= 0; i<len(memo); i++ {
		if memo[i] > x {
			fmt.Println(memo[i])
			break
		}
	}
}
func toKeys (memo map[int]bool)[]int{
	k := 0
	output := make([]int, len(memo))
	for i,_ := range memo {
		output[k] = i
		k++
	}
	sort.Ints(output)
	return output
}
func allSosu(max int) map[int]bool{
	// max値までの素数群を返す
	// 計算量logmax*logmax
	output := map[int]bool{}
	furui := make([]int, max+1)
	for i:= 2; i*i<=max; i++ {
		if furui[i] > 0 {
			continue
		}
		for j:=i+i; j<=max; j += i{
			furui[j]++
		}
	}
	for i:=2; i<=max; i++ {
		if furui[i] == 0 {
			output[i] = true
		}
	}
	return output
}
var sc = bufio.NewScanner(os.Stdin)

func scan_init() {
	sc.Split(bufio.ScanWords)
}
func scanInt() int {
	sc.Scan()
	i, _ := strconv.Atoi(sc.Text())
	return i
}
func scan() string {
	sc.Scan()
	return sc.Text()
}

var rdr = bufio.NewReaderSize(os.Stdin, 200000)

func readLine() string {
	buf := make([]byte, 0, 200000)
	for {
		l, p, e := rdr.ReadLine()
		if e != nil {
			panic(e)
		}
		buf = append(buf, l...)
		if !p {
			break
		}
	}
	return string(buf)
}
func readLineToNumber() int {
	S := readLine()
	number, _ := strconv.Atoi(S)
	return number
}
func readLineToSlice() []string {
	S := readLine()
	list := strings.Split(S, "")
	return list
}
func readLineToNumberSlice(memo map[string]int) []int {
	// err時は-1を代入
	S := readLine()
	intList := make([]int, len(S))
	for i := 0; i < len(S); i++ {
		if val, ok := memo[string(S[i])]; ok {
			intList[i] = val
		} else {
			intList[i] = -1
		}
	}
	return intList
}


x = gets.to_i

def isPrime(i)
  (2..i**0.5).each do |j|
    return false if i % j == 0
  end
  return true
end

while !isPrime(x)
  x += 1
end

puts x


include Math
# 入力
X = gets.to_i

# 素数判定関数
def is_prime(n)
  if n == 2
    return true
  end
  cnt = 0
  2.upto Math.sqrt(n).ceil do |i|
    if n % i == 0
      return false
    end
  end
  return n != 1
end

X.upto 10e5 do |i|
  if is_prime(i)
    puts i
    exit
  end
end


n = gets.chomp.to_i
while true do
  flag = true

  (2..Math.sqrt(n).to_i).each do |i|
    if n % i == 0 then
      flag = false
      break
    end
  end

  if flag then
    puts n
    break
  end

  n += 1
end


x,y,z=gets.split.map(&:to_i)
if x>=z
  puts "#{x-z} #{y}"
elsif x+y<=z
  puts "0 0"
else
  puts "0 #{y+x-z}"
end


x = gets.chomp.to_i
list = (1..4999).to_a
list.map! {|i| i*2+1}
prime_list = [2]
while true
    value = list[0]
    prime_list.push(value)
    list.delete_if{|num| num % value == 0}
    if list.size == 0
        break
    end
end
prime_list.push(100003)
first = prime_list.index {|v| v >= x }
print prime_list[first]


x = gets.chomp.to_i
list = (2..100000).to_a
prime_list = []
sqrt = Math.sqrt(x).floor
while true
    value = list[0]
    prime_list.push(value)
    list.delete_if{|num| num % value == 0}
    if list.size == 0
        break
    end
end
prime_list.push(100003)
first = prime_list.index {|v| v > x }
print prime_list[first]


macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        let mut next = || { iter.next().unwrap() };
        input_inner!{next, $($r)*}
    };
    ($($r:tt)*) => {
        let stdin = std::io::stdin();
        let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock()));
        let mut next = move || -> String {
            bytes
                .by_ref()
                .map(|r| r.unwrap() as char)
                .skip_while(|c| c.is_whitespace())
                .take_while(|c| !c.is_whitespace())
                .collect()
        };
        input_inner!{next, $($r)*}
    };
}

macro_rules! input_inner {
    ($next:expr) => {};
    ($next:expr, ) => {};

    ($next:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($next, $t);
        input_inner!{$next $($r)*}
    };

    ($next:expr, mut $var:ident : $t:tt $($r:tt)*) => {
        let mut $var = read_value!($next, $t);
        input_inner!{$next $($r)*}
    };
}

macro_rules! read_value {
    ($next:expr, ( $($t:tt),* )) => {
        ( $(read_value!($next, $t)),* )
    };

    ($next:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
    };

    ($next:expr, [ $t:tt ]) => {
        {
            let len = read_value!($next, usize);
            (0..len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
        }
    };

    ($next:expr, chars) => {
        read_value!($next, String).chars().collect::<Vec<char>>()
    };

    ($next:expr, usize1) => {
        read_value!($next, usize) - 1
    };

    ($next:expr, $t:ty) => {
        $next().parse::<$t>().expect("Parse error")
    };
}
mod prime {
    pub fn is_prime(n: usize) -> bool {
        match n {
            0 | 1 => false,
            2 => true,
            _ => {
                if n % 2 == 0 {
                    return false;
                }
                let mut i = 3;
                while i <= (n as f64).sqrt() as usize + 1 {
                    if n % i == 0 {
                        return false;
                    }
                    i += 2;
                }
                true
            }
        }
    }
    pub fn prime_all(n: usize) -> Vec<usize> {
        let mut list = Vec::new();
        list.push(2);
        for i in 3..n + 1 {
            let mut flg = false;
            for j in &list {
                if i % j == 0 {
                    flg=true;
                    break;
                }
                if i < j*j {
                    break;
                }
            }
            if !flg {
                list.push(i);
            }
        }
        list
    }

    pub fn factorize(mut n: usize) -> Vec<(usize, usize)> {
        let mut list = Vec::new();
        if is_prime(n) {
            list.push((n, 1));
            return list;
        }
        let primes = prime_all((n as f64).sqrt() as usize + 1);
        for x in &primes {
            let x = *x;
            if n % x != 0 {
                continue;
            }
            list.push((x, 0_usize));
            while n % x == 0 {
                n /= x;
                let index = list.len() - 1;
                list[index].1 += 1;
            }
            if is_prime(n) {
                list.push((n, 1));
                break;
            }
        }
        list
    }
}

fn main() {
    input!(x:i32);
    for i in x.. {
        if prime::is_prime(i as usize) {
            println!("{}",i);
            return;
        }
    }
}


#![allow(unused_macros, deprecated)]

#[allow(dead_code)]
mod utils {
    use std::io::{
        self, BufRead, BufReader, BufWriter, Seek, SeekFrom, Stdin, StdinLock, Stdout, StdoutLock,
        Write,
    };
    use std::mem;
    use std::ops::{Deref, DerefMut};
    use std::ptr;
    use std::slice;
    use std::str::{self, FromStr};

    #[inline]
    fn is_space_or_line_break(b: &u8) -> bool {
        *b == b' ' || *b == b'\n'
    }

    pub struct Scanner<R: BufRead> {
        reader: R,
        buf: Vec<u8>,
    }

    impl<R: BufRead> Scanner<R> {
        #[inline]
        pub fn new(reader: R) -> Scanner<R> {
            Scanner {
                reader: reader,
                buf: Vec::with_capacity(100),
            }
        }

        pub fn read<T: FromStr>(&mut self) -> T {
            self.read_until(is_space_or_line_break);
            self.parse()
        }

        pub fn read2<T1: FromStr, T2: FromStr>(&mut self) -> (T1, T2) {
            (self.read(), self.read())
        }

        pub fn read3<T1: FromStr, T2: FromStr, T3: FromStr>(&mut self) -> (T1, T2, T3) {
            (self.read(), self.read(), self.read())
        }

        pub fn read4<T1: FromStr, T2: FromStr, T3: FromStr, T4: FromStr>(
            &mut self,
        ) -> (T1, T2, T3, T4) {
            (self.read(), self.read(), self.read(), self.read())
        }

        pub fn reads(&mut self) -> &str {
            self.read_until(is_space_or_line_break);
            unsafe { str::from_utf8_unchecked(&self.buf) }
        }

        pub fn readl(&mut self) -> &str {
            self.buf.clear();
            self.reader.read_until(b'\n', &mut self.buf).unwrap();
            let bytes = if self.buf.last() == Some(&b'\n') {
                &self.buf[..self.buf.len() - 1]
            } else {
                &self.buf
            };
            unsafe { str::from_utf8_unchecked(&bytes) }
        }

        pub fn read_vec<T: FromStr>(&mut self, count: usize) -> Vec<T> {
            (0..count).map(|_| self.read()).collect()
        }

        fn read_until<P: FnMut(&u8) -> bool>(&mut self, mut predicate: P) {
            self.buf.clear();
            let mut first = true;

            // https://doc.rust-lang.org/src/std/io/mod.rs.html#1623-1649
            loop {
                let (done, used) = {
                    let available = self.reader.fill_buf().unwrap();
                    if first && available.len() == 0 {
                        panic!("Scan Error (EOF reached)");
                    }

                    match available.iter().position(&mut predicate) {
                        Some(0) if first => (false, 1),
                        Some(i) => {
                            self.buf.extend_from_slice(&available[..i]);
                            (true, i + 1)
                        }
                        None => {
                            self.buf.extend_from_slice(available);
                            (false, available.len())
                        }
                    }
                };

                self.reader.consume(used);
                if done || used == 0 {
                    return;
                }

                first = false;
            }
        }

        #[inline]
        fn parse<T: FromStr>(&mut self) -> T {
            // 文字列をT型へパースする
            let elem = unsafe { str::from_utf8_unchecked(&self.buf) };
            elem.parse()
                .unwrap_or_else(|_| panic!(format!("failed parsing: {}", elem)))
        }
    }

    impl<R: BufRead + Seek> Seek for Scanner<R> {
        #[inline]
        fn seek(&mut self, pos: SeekFrom) -> io::Result<u64> {
            self.reader.seek(pos)
        }
    }

    pub struct StdinScanner {
        stdin: Stdin,
        scanner: Scanner<BufReader<StdinLock<'static>>>,
    }

    impl StdinScanner {
        #[inline]
        pub fn new() -> StdinScanner {
            let stdin = io::stdin();
            let stdinlock = unsafe { mem::transmute(stdin.lock()) };
            let reader = BufReader::with_capacity(4096, stdinlock);
            let scanner = Scanner::new(reader);
            StdinScanner {
                stdin: stdin,
                scanner: scanner,
            }
        }
    }

    impl Deref for StdinScanner {
        type Target = Scanner<BufReader<StdinLock<'static>>>;

        #[inline]
        fn deref(&self) -> &Self::Target {
            &self.scanner
        }
    }

    impl DerefMut for StdinScanner {
        #[inline]
        fn deref_mut(&mut self) -> &mut Self::Target {
            &mut self.scanner
        }
    }

    pub struct StdoutWriter {
        stdout: Stdout,
        writer: BufWriter<StdoutLock<'static>>,
    }

    impl StdoutWriter {
        #[inline]
        pub fn new() -> StdoutWriter {
            let stdout = io::stdout();
            let stdoutlock = unsafe { mem::transmute(stdout.lock()) };
            let writer = BufWriter::with_capacity(4096, stdoutlock);
            StdoutWriter {
                stdout: stdout,
                writer: writer,
            }
        }

        pub fn write<T: Writable>(&mut self, v: T) {
            v.display(&mut self.writer);
        }

        pub fn writeln<T: Writable>(&mut self, v: T) {
            v.display(&mut self.writer);
            self.writer.write_all(b"\n").unwrap();
        }

        pub fn write_horizontal<I>(&mut self, iter: I)
        where
            I: IntoIterator,
            I::Item: Writable,
        {
            let mut it = iter.into_iter();
            if let Some(elem) = it.next() {
                elem.display(&mut self.writer);
            } else {
                return;
            }

            for elem in it {
                elem.display(&mut self.writer);
                self.writer.write_all(b" ").unwrap();
            }
        }

        pub fn write_vertical<I>(&mut self, iter: I)
        where
            I: IntoIterator,
            I::Item: Writable,
        {
            let mut it = iter.into_iter();
            if let Some(elem) = it.next() {
                elem.display(&mut self.writer);
            } else {
                return;
            }

            for elem in it {
                elem.display(&mut self.writer);
                self.writer.write_all(b"\n").unwrap();
            }
        }
    }

    impl Write for StdoutWriter {
        #[inline]
        fn flush(&mut self) -> io::Result<()> {
            self.writer.flush()
        }

        #[inline]
        fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
            self.writer.write(buf)
        }
    }

    static DEC_DIGITS_LUT: &'static [u8; 200] = b"0001020304050607080910111213141516171819\
            2021222324252627282930313233343536373839\
            4041424344454647484950515253545556575859\
            6061626364656667686970717273747576777879\
            8081828384858687888990919293949596979899";

    fn write_int<W: Write>(mut writer: W, mut n: u64, is_negative: bool) {
        unsafe {
            let mut buf: [u8; 39] = mem::uninitialized();
            let buf_ptr_start = buf.as_mut_ptr().offset(39);
            let mut buf_ptr = buf_ptr_start;
            let lut_ptr = DEC_DIGITS_LUT.as_ptr();

            while n >= 10000 {
                let rem = (n % 10000) as isize;
                n /= 10000;

                let d1 = (rem / 100) << 1;
                let d2 = (rem % 100) << 1;
                buf_ptr = buf_ptr.offset(-4);
                ptr::copy_nonoverlapping(lut_ptr.offset(d1), buf_ptr, 2);
                ptr::copy_nonoverlapping(lut_ptr.offset(d2), buf_ptr.offset(2), 2);
            }

            let mut n = n as isize; // possibly reduce 64bit math

            // decode 2 more chars, if > 2 chars
            if n >= 100 {
                let d1 = (n % 100) << 1;
                n /= 100;
                buf_ptr = buf_ptr.offset(-2);
                ptr::copy_nonoverlapping(lut_ptr.offset(d1), buf_ptr, 2);
            }

            // decode last 1 or 2 chars
            if n < 10 {
                buf_ptr = buf_ptr.offset(-1);
                *buf_ptr = (n as u8) + b'0';
            } else {
                let d1 = n << 1;
                buf_ptr = buf_ptr.offset(-2);
                ptr::copy_nonoverlapping(lut_ptr.offset(d1), buf_ptr, 2);
            }

            if is_negative {
                buf_ptr = buf_ptr.offset(-1);
                *buf_ptr = b'-';
            }

            let buf_slice =
                slice::from_raw_parts(buf_ptr, buf_ptr_start as usize - buf_ptr as usize);

            writer.write_all(buf_slice).unwrap();
        }
    }

    pub trait Writable {
        fn display<W: Write>(&self, writer: &mut W);
    }

    impl Writable for str {
        #[inline]
        fn display<W: Write>(&self, writer: &mut W) {
            writer.write_all(self.as_bytes()).unwrap()
        }
    }

    impl<'a> Writable for &'a str {
        #[inline]
        fn display<W: Write>(&self, writer: &mut W) {
            writer.write_all(self.as_bytes()).unwrap()
        }
    }

    impl Writable for String {
        #[inline]
        fn display<W: Write>(&self, writer: &mut W) {
            writer.write_all(self.as_bytes()).unwrap()
        }
    }

    impl Writable for bool {
        #[inline]
        fn display<W: Write>(&self, writer: &mut W) {
            let s: &'static [u8] = if *self { b"Yes" } else { b"No" };
            writer.write_all(s).unwrap();
        }
    }

    macro_rules! impl_writable_int {
        ($($int:ty)*) => {
            $(
                impl Writable for $int {
                    #[allow(unused_comparisons)]
                    fn display<W: Write>(&self, writer: &mut W) {
                        let is_negative = !(*self >= 0);
                        let abs = if is_negative {
                            (!*self as u64).wrapping_add(1)
                        } else {
                            *self as u64
                        };
                        write_int(writer, abs, is_negative);
                    }
                }
            )*
        };
    }

    macro_rules! impl_writable_float {
        ($($float:ty)*) => {
            $(
                impl Writable for $float {
                    #[inline]
                    fn display<W: Write>(&self, writer: &mut W) {
                        write!(writer, "{}", *self).unwrap();
                    }
                }
            )*
        }
    }

    impl_writable_int!(u8 u16 u32 u64 usize i8 i16 i32 i64 isize);
    impl_writable_float!(f32 f64);

    pub static mut SCANNER: *mut StdinScanner = 0 as *mut StdinScanner;
    pub static mut WRITER: *mut StdoutWriter = 0 as *mut StdoutWriter;

    #[inline]
    pub fn atcoder_initialize() {
        unsafe {
            SCANNER = mem::transmute(Box::new(StdinScanner::new()));
            WRITER = mem::transmute(Box::new(StdoutWriter::new()));
        }
    }

    #[inline]
    pub fn atcoder_finish() {
        unsafe {
            (*WRITER).flush().unwrap();
        }
    }
}

macro_rules! input {
    () => {};
    (@scanner $scanner:ident, @pred [ $($pred:tt)* ], ($var1:tt, $var2:tt) : [($t1:tt, $t2:tt) ; $len:expr]) => {
        let mut $var1 = Vec::with_capacity($len as usize);
        let mut $var2 = Vec::with_capacity($len as usize);

        for _ in 0..$len {
            $var1.push(scan!($scanner, $t1));
            $var2.push(scan!($scanner, $t2));
        }
    };
    (@scanner $scanner:ident, @pred [ $($pred:tt)* ], $var:tt : $t:tt) => {
        let $($pred)* $var = scan!($scanner, $t);
    };
    (@scanner $scanner:ident,) => {};
    (@scanner $scanner:ident, $var:tt : $t:tt) => {
        input!(@scanner $scanner, @pred [], $var : $t);
    };
    (@scanner $scanner:ident, mut $var:tt : $t:tt) => {
        input!(@scanner $scanner, @pred [mut], $var : $t);
    };
    (@scanner $scanner:ident, $var:tt : $t:tt, $($r:tt)*) => {
        input!(@scanner $scanner, $var : $t);
        input!(@scanner $scanner, $($r)*);
    };
    (@scanner $scanner:ident, mut $var:tt : $t:tt, $($r:tt)*) => {
        input!(@scanner $scanner, mut $var : $t);
        input!(@scanner $scanner, $($r)*);
    };
    ($($r:tt)*) => {
        let scanner_ref = unsafe { &mut *$crate::utils::SCANNER };
        input!(@scanner scanner_ref, $($r)*);
    }
}

macro_rules! scan {
    ($scanner:ident, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| scan!($scanner, $t)).collect::<Vec<_>>()
    };
    ($scanner:ident, usize1) => {
        scan!($scanner, usize) - 1
    };
    ($scanner:ident, line) => {
        $scanner.readl().to_string()
    };
    ($scanner:ident, $t:ty) => {
        $scanner.read::<$t>()
    };
}

macro_rules! pprint {
    ($value:expr) => {
        unsafe {
            (*$crate::utils::WRITER).write($value);
        }
    };
    ($value:expr, $($r:tt)*) => {
        let writer = unsafe { &*$crate::utils::WRITER };
        writer.write($value);
        writer.write(" ");
        pprint!($($r)*);
    };
}

macro_rules! pprintln {
    ($value:expr) => {
        unsafe {
            (*$crate::utils::WRITER).writeln($value);
        }
    };
    ($value:expr, $($r:tt)*) => {
        let writer = unsafe { &*$crate::utils::WRITER };
        writer.write($value);
        writer.write(" ");
        pprintln!($($r)*);
    };
}

macro_rules! atcoder_main {
    ($func:ident) => {
        fn main() {
            $crate::utils::atcoder_initialize();
            $func();
            $crate::utils::atcoder_finish();
        }
    };
}

fn is_prime(x: u64) -> bool {
    let mut i = 2;

    while i * i <= x {
        if x % i == 0 {
            return false;
        }
        i += 1;
    }

    true
}

fn run() {
    input! {
        mut x: u64
    }

    loop {
        if is_prime(x) {
            pprintln!(x);
            return;
        }

        x += 1;
    }
}

atcoder_main!(run);


fn main() {
    let n = read::<u32>();

    let mut x = n;
    loop {
        if is_prime(x) {
            println!("{}", x);
            break;
        }
        x += 1
    }
}

fn is_prime(n: u32) -> bool {
    n != 1 && (2..).take_while(|x| x * x <= n).all(|x| n % x != 0)
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).unwrap();
    s.trim().parse().ok().unwrap()
}


use proconio::{fastout, input};

#[fastout]
fn main() {
    // input! {n: usize, ab: [[usize;2];n]};
    // let mut ab: Vec<Vec<usize>> = ab;

    input! {x: usize};

    let mut b = true;
    if x <= 2 {
        println!("2")
    }
    let mut i = x;
    while true {
        let mut j = 3;
        while j <= (i as f64).sqrt() as usize {
            if i % j == 0 {
                b = false;
                break;
            }
            j += 2;
        }
        if b {
            println!("{}", i);
            break;
        }
        i += 2;
    }
}


use std::io::*;
use std::str::FromStr;
use std::collections::*;

fn read<T: FromStr>() -> T {
    let stdin = stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("failed to read char") as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().expect("failed to parse token")
}

fn get_next_prime(mut x: usize) {
    loop {
        let mut is_prime_cnt = 0;
        for p in 2..x {
            if x%p==0 {
                break;
            } else {
                is_prime_cnt += 1;
            }
        }
        if is_prime_cnt==x-2 {
            println!("{}", x);
            return;
        }
    }
    x += 1;
}

fn main() {
    let X: usize = read();
    get_next_prime(X);
}


use std::io::*;
use std::str::FromStr;
use std::collections::*;

fn read<T: FromStr>() -> T {
    let stdin = stdin();
    let stdin = stdin.lock();
    let token: String = stdin
        .bytes()
        .map(|c| c.expect("failed to read char") as char)
        .skip_while(|c| c.is_whitespace())
        .take_while(|c| !c.is_whitespace())
        .collect();
    token.parse().ok().expect("failed to parse token")
}

fn get_next_prime(mut x: usize) {
    loop {
        x += 1;
        let mut is_prime_cnt = 0;
        for p in 2..x {
            if x%p==0 {
                break;
            } else {
                is_prime_cnt += 1;
            }
        }
        if is_prime_cnt==x-2 {
            println!("{}", x);
            return;
        }
    }
}

fn main() {
    let X: usize = read();
    get_next_prime(X);
}


func is_prime(n: Int) -> Bool{
    if (n <= 1) {
        return false
    }

    if (n <= 3) {
        return true
    }

    var i = 2
    while (i*i <= n) {
        if (n % i == 0) {
           return false
        }

        i = i + 1
    }
    return true
}

let a=Int(readLine()!)!

var i = 0
while( true ) {
	if( is_prime(a + i) ) {
      print(a + i)
      break
    }
    i += 1
}


// 🐋💭 Next Prime
import Foundation

func readInts() -> [Int] {
    return readLine()!.split(separator: " ").map { Int($0)! }
}

func readInt() -> Int {
    return Int(readLine()!)!
}

func main() {
    var x = readInt()
    var count = 0
    var isNotPrime = true

    while isNotPrime {
        for i in 1..<x {
            count += x % i == 0 ? 1: 0
            if count > 1 {
                break
            }

        }
        if count > 1 {
            count = 0
            x += 1
        } else {
            isNotPrime = false
        }

    }
    print(x)
}
main()


import Foundation
// 第一引数に、素数かどうかを判定したい自然数を渡す
func check_primes(n:Int)->Bool{
    // 計算するのは√nまでで十分
    for i in 2...Int(sqrt(Double(n)))+1{
        // コーナーケースになりうるものは除いておく
        if i > n || n == 2{
            continue
        }
        if n%i == 0{
            return false
        }
    }
    return true
}

// 標準入力の受け取り
var x = Int(readLine()!)!

// 素数に当たるまでループを回す
while !check_primes(n:x){
    x+=1
}

// 答えを出力
print(x)


import Foundation
// 第一引数に、素数かどうかを判定したい自然数を渡す
func check_primes(n:Int)->Bool{
    // 計算するのは√nまでで十分
    for i in 2...Int(sqrt(Double(n))){
        if n%i == 0{
            return false
        }
    }
    return true
}

// 標準入力の受け取り
var x = Int(readLine()!)!

// 素数に当たるまでループを回す
while !check_primes(n:x){
    x+=1
}

// 答えを出力
print(x)


const main = (input: string) => {
  const N = parseInt(input.trim())
  let isNotFound = true
  let primeNumber = N

  const getPrimeNumber = (n: number) => {
    if (n === 2) return true;
    for (let i = 2; i < n; i++) {
      if (n % i === 0) return false;
    }
    return true;
  }

  let count = 0
  while(isNotFound) {
    if(getPrimeNumber(N + count)) {
      primeNumber = N + count
      isNotFound = false
    }
    count += 1
  }
  console.log(primeNumber)
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'));


export class Main {
  static main(input: string): string {
    const tmp: string[] = input.split("\n");
    const [x]: number[] = tmp[0].split(" ").map(int => parseInt(int));
    let result = x;
    while(true) {
      if (Main.isPrime(result)) {
        return `${result}`;
      }
      result++;
    }
  }
  static isPrime(x) {
    for (let i = 2, len = Math.floor(Math.sqrt(x)); i <= len; i++) {
      if (x % i == 0) {
        return false;
      }
    }
    return true;
  }
}
console.log(Main.main(require("fs").readFileSync("/dev/stdin", "utf8")));


const input=require('fs').readFileSync('/dev/stdin','utf8').split(/[\s]/);let input_i=-1;const tn=():number=>{input_i++;return Number(input[input_i])};const tnn=(n:number):number[]=>{const a=[];for(let i=0;i<n;i++){a.push(tn())}return a};const ts=():string=>{input_i++;return String(input[input_i])};const tss=(n:number):string[]=>{const a=[];for(let i=0;i<n;i++){a.push(ts())}return a};const to=(...arg)=>{console.log(...arg)};const abs=(a)=>{return Math.abs(a)};const min=(...a)=>{return Math.min(...a)};const max=(...a)=>{return Math.max(...a)};const floor=(a)=>{return Math.floor(a)};const ceil=(a)=>{return Math.ceil(a)};const asc=(ar:number[])=>{const t=[...ar];return ar.sort((a,b)=>{return a-b})};const desc=(ar:number[])=>{const t=[...ar];return t.sort((a,b)=>{return b-a})};const sw=(a,arr:any[],op:'=='|'>='|'>'|'<='|'<'='==')=>{for(let i=0;i<arr.length-1;i+=2){if(eval(a+op+arr[i])){return arr[i+1]}}return arr[arr.length-1]};const near=(n:number,arr:number[]):number=>{let ne=arr[0],ni=0;for(let i=1;i<arr.length;i++){if(Math.abs(n-ne)>Math.abs(n-arr[i])){ne=arr[i];ni=i}}return ni};const deduplicate=(a:any[]):any[]=>{return Array.from(new Set(a))};const gcd=(x,y)=>{while(y){[x,y]=[y,x%y]}return x};const sum=(arr)=>{return arr.reduce((a,b)=>a+b);};const isPrime=(n:number):boolean=>{if(n<2)return false;const suq=Math.sqrt(n);for(let i=2;i<=suq;i++){if(n%i==0){return false;}}return true;};
const main=()=>{
  let a=tn()
  while(true){
    if(isPrime(a)){
      to(a)
      return
    }
    a++
  }
}
main()