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n, eng = int(input()), set(map(int, input().split())) b, fren = int(input()), set(map(int, input().split())) print(len(eng.symmetric_difference(fren)))
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Set .symmetric_difference() Operation
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n, eng = int(input()), set(map(int, input().split())) b, fren = int(input()), set(map(int, input().split())) print(len(eng.symmetric_difference(fren)))