m=int(input())
a=list(map(int,input().split()))
a=set(a)
n=int(input())
b=list(map(int,input().split()))
b=set(b)
c=a.intersection(b)
d=a.union(b)
e=d.difference(c)
e=sorted(e)
for i in range(len(e)):
    print(e[i],end='\n')