# !/usr/bin/env python3
# -*- coding: utf-8 -*-
__author__ = 'tianyi'
__date__ = '2024/3/21 22:56 '
__file__ = 'HW_HJ80.py'

import sys
list1 = []
for i in sys.stdin:
    list1.append(i.split())
list2 = []
list2=list1[1]
#将list1中的第四个列表的值加到list2中
list2.extend(list1[3])
list2.sort(key=int)
string1 = ""
for i in range(len(list2)):
    if i < len(list2)-1:
        if list2[i] != list2[i+1]:
            string1 += list2[i]
    else:
        string1 += list2[i]
print(string1)

list2.sort(key=int) 从小到大排列 并且替换原列表