Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
Add 1 Ritual Spell from your Deck to your hand, and add 1 Ritual Monster from your Deck or GY to your hand whose name is mentioned on that Ritual Spell. You can only activate 1 "Pre-Preparation of Rites" per turn.
--儀式の下準備
--Pre-Preparation of Rites
local s,id=GetID()
function s.initial_effect(c)
	--Activate
	local e1=Effect.CreateEffect(c)
	e1:SetCategory(CATEGORY_TOHAND+CATEGORY_SEARCH)
	e1:SetType(EFFECT_TYPE_ACTIVATE)
	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
function s.filter(c,tp)
	return c:IsRitualSpell() and c:IsAbleToHand()
		and Duel.IsExistingMatchingCard(s.filter2,tp,LOCATION_DECK|LOCATION_GRAVE,0,1,nil,c)
end
function s.filter2(c,mc)
	return c:IsRitualMonster() and c:IsAbleToHand() and s.isfit(c,mc)
end
function s.isfit(c,mc)
	return (mc.fit_monster and c:IsCode(table.unpack(mc.fit_monster))) or mc:ListsCode(c:GetCode())
end
function s.target(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.IsExistingMatchingCard(s.filter,tp,LOCATION_DECK,0,1,nil,tp) end
	Duel.SetOperationInfo(0,CATEGORY_TOHAND,nil,2,tp,LOCATION_DECK|LOCATION_GRAVE)
end
function s.activate(e,tp,eg,ep,ev,re,r,rp)
	Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
	local g=Duel.SelectMatchingCard(tp,s.filter,tp,LOCATION_DECK,0,1,1,nil,tp)
	if #g>0 then
		local mg=Duel.GetMatchingGroup(aux.NecroValleyFilter(s.filter2),tp,LOCATION_DECK|LOCATION_GRAVE,0,nil,g:GetFirst())
		if #mg>0 then
			Duel.Hint(HINT_SELECTMSG,tp,HINTMSG_ATOHAND)
			local sg=mg:Select(tp,1,1,nil)
			g:Merge(sg)
			Duel.SendtoHand(g,nil,REASON_EFFECT)
			Duel.ConfirmCards(1-tp,g)
		end
	end
end