题解 | #整型数组合并#

num = []
n1 = int(input())
for i in [int(x) for x in input().split()]:
    if i not in num:
        num.append(i)
n2 = int(input())
for i in [int(x) for x in input().split()]:
    if i not in num:
        num.append(i)
num = sorted(num, reverse=False)
num = list(map(str,num))#数字列表无法使用join函数，因而要先将其转换为字符串类型
print(''.join(num))