No Idea!

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    n,m = map(int, input().split()) list1 = list(map(int, input().split())) set1 = set(map(int, input().split())) set2 = set(map(int, input().split())) happ = 0

    happ = sum((i in set1) - (i in set2) for i in list1)

    print(happ)