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a=int(input()) n=set(map(int,input().split())) b=int(input()) e=set(map(int,input().split())) r=n.union(e) print(len(r))
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Set .union() Operation
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a=int(input()) n=set(map(int,input().split())) b=int(input()) e=set(map(int,input().split())) r=n.union(e) print(len(r))