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if name == 'main':
M = int(input())
setM = set(map(int, input().split()))
N = int(input())
setN = set(map(int, input().split()))
res = setM.difference(setN)
res.update(setN.difference(setM))
for x in sorted(res):
print(x)
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if name == 'main': M = int(input()) setM = set(map(int, input().split())) N = int(input()) setN = set(map(int, input().split())) res = setM.difference(setN) res.update(setN.difference(setM)) for x in sorted(res): print(x)