#include<iostream>

#include<stdio.h>

#include<algorithm>

using namespace std;

int a[];

int main(){

    int t,n,i;

    scanf("%d",&t);

    while(t--){

        scanf("%d",&n);

        for(i=;i<n;++i)

            scanf("%d",&a[i]);

        sort(a,a+n);

        for(i=;i<n-;++i)

            printf("%d ",a[i]);

        printf("%d\n",a[i]);

    }

    return ;

}