题解 | #整型数组合并#

# 20240925
n1 = int(input())
ls1 = list(map(int,input().split()))
n2 = int(input())
ls2 = list(map(int,input().split()))
ls3 = ls1 + ls2
ls4 = list(set(ls3))
ls4.sort()
print(''.join(map(str,ls4)))