Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Draw cards equal to the number of "Number" Xyz Monsters with different names you control. You can only activate 1 "Memories of Hope" per turn.
--希望の記憶
--Memories of Hope
--Scripted by AlphaKretin
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_DRAW)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	e1:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e1:SetCode(EVENT_FREE_CHAIN)
	e1:SetCountLimit(1,id,EFFECT_COUNT_CODE_OATH)
	e1:SetTarget(s.target)
	e1:SetOperation(s.activate)
	c:RegisterEffect(e1)
end
s.listed_series={SET_NUMBER}
function s.filter(c)
	return c:IsFaceup() and c:IsSetCard(SET_NUMBER) and c:IsType(TYPE_XYZ)
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	local g=Duel.GetMatchingGroup(s.filter,tp,LOCATION_MZONE,0,nil)
	local ct=g:GetClassCount(Card.GetCode)
	if chk==0 then return ct>0 and Duel.IsPlayerCanDraw(tp,ct) end
	Duel.SetTargetPlayer(tp)
	Duel.SetTargetParam(ct)
	Duel.SetOperationInfo(0,CATEGORY_DRAW,nil,0,tp,ct)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	local p=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER)
	local g=Duel.GetMatchingGroup(s.filter,tp,LOCATION_MZONE,0,nil)
	local ct=g:GetClassCount(Card.GetCode)
	Duel.Draw(p,ct,REASON_EFFECT)
end