I dont know why 5 test cases are wrong.kindly help

mystr=input()#Taking n.m no value for me so discard

mystr=input()

mystr=mystr.rstrip()

myset=set(mystr.split())

mystr=input()

mystr=mystr.rstrip()

mysetA=set(mystr.split())

mystr=input()

mystr=mystr.rstrip()

mysetB=set(mystr.split())

x = myset.intersection(mysetA)

xlen=len(x)

x = myset.intersection(mysetB)

ylen=len(x)

happiness=abs(xlen-ylen) print(happiness)