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english = int(input()) english_s = set(list(map(int, input().split()))) france = int(input()) france_s = set(list(map(int, input().split()))) print(len(english_s.difference(france_s)))
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Set .difference() Operation
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english = int(input()) english_s = set(list(map(int, input().split()))) france = int(input()) france_s = set(list(map(int, input().split()))) print(len(english_s.difference(france_s)))