package main

import ."fmt"
import . "sort"

func main() {
	var n int
	Scan(&n)
	for ;n>0;n-- {
		var k int
		Scan(&k)
		x:=make([]int,k,k)
		for i:=range x {
			Scan(&x[i])
		}
		Ints(x)
		s:=""
		for _,v:=range x {
			s=Sprint(s," ",v)
		}
		Println(s[1:])
	}
}