//链表
// 1.arr1.concat(arr2)
// 2.[...arr1,...arr2]
const readline = require('readline')
const rl = readline.createInterface({
input: process.stdin,
ouput: process.stdout
})
let inArr = []
rl.on('line',line=>{
if(!line) return
inArr.push(line)
if(inArr.length === 2){
let list1 = inArr[0].split(' ').map(e => +e)
let list2 = inArr[1].split(' ').map(e => +e)
// let res = list1.concat(list2)
let res = [...list1, ...list2]
res.sort((a,b) =>a-b)
console.log(res.join(' '))
}
})