

'''simple docstring'''






from math import factorial


def 	_A  (					A__  ,       A__   ):






 """simple docstring"""



 if n < k or k < 0:
  raise ValueError('''Please enter positive integers for n and k where n >= k'''   )
 return factorial(A__   ) // (factorial(A__   ) * factorial(n - k   ))


if __name__ == "__main__":
 print(
     '''The number of five-card hands possible from a standard''',
     f'fifty-two card deck is: {combinations(52, 5)}\n',
 )

 print(
     '''If a class of 40 students must be arranged into groups of''',
     f'4 for group projects, there are {combinations(40, 4)} ways',
     '''to arrange them.\n''',
 )

 print(
     '''If 10 teams are competing in a Formula One race, there''',
     f'are {combinations(10, 3)} ways that first, second and',
     '''third place can be awarded.''',
 )





'''simple docstring'''






import re


def 	_A  (					A__   ):






 """simple docstring"""



 __lowercase													=				re.compile(
     R'''^(?:0|94|\+94|0{2}94)''' R'''7(0|1|2|4|5|6|7|8)''' R'''(-| |)''' R'''\d{7}$'''   )

 return bool(re.search(A__  ,       A__   )   )


if __name__ == "__main__":
 lowerCAmelCase__      		=			'''0094702343221'''

 print(is_sri_lankan_phone_number(phone))

