题解 | #整型数组合并#

import sys

a = input()
arr_a =input().split(" ")
b = input()
arr_b = input().split(" ")
c = arr_a + arr_b
c = set(c)
c = list(c)
for i in range(len(c)):
    c[i] = int(c[i])
c.sort()
for i in range(len(c)):
    print(c[i],end ="")