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n, n_roll, b, b_roll = int(input()), set(input().split()), int(input()), set(input().split()) print(len(list(n_roll.union(b_roll))))
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Set .union() Operation
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n, n_roll, b, b_roll = int(input()), set(input().split()), int(input()), set(input().split()) print(len(list(n_roll.union(b_roll))))