n = int(input())
a = set()
a_initial_value = []
a_initial_value = list(map(int, input().split()))
for i in range(n):
    a.add(a_initial_value[i])

m = int(input())
b = set()
b_initial_value = []
b_initial_value = list(map(int, input().split()))
for j in range(m):
    b.add(b_initial_value[j])


a_difference = a.difference(b)
b_difference = b.difference(a)
ab_union = a_difference.union(b_difference)


ab_union = list(ab_union)

ab_union.sort()

for k in ab_union:
    print(k)