Symmetric Difference

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    m=int(input())
    M=set(map(int,input().split()))
    n=int(input())
    N=set(map(int,input().split()))
    l1=list((M.difference(N)))
    l2=list((N.difference(M)))
    l=l1+l2
    for i in sorted(l):
        print(i)