def diff_set(a, b):
    # (a.difference(b)).union(b.difference(a)) == a.symmetric_difference(b)
    sorted_list = sorted(a.symmetric_difference(b))   
    for i in (sorted_list):
        print(i)
    return 0

if __name__ =='__main__':
    M = int(input())
    a = set(map(int,input().split()))
    N = int(input())
    b = set(map(int,input().split()))
    diff_set(a, b)