#include <cstdio>
#include <iostream>
#include <sstream>
#include <string>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <queue>
#include <vector>
#define PI acos(-1.0)
#define ms(a) memset(a,0,sizeof(a))
#define msp memset(mp,0,sizeof(mp))
#define msv memset(vis,0,sizeof(vis))
#define msd memset(dp,0,sizeof(dp))
using namespace std;
//#define LOCAL
int main()
{
#ifdef LOCAL
    freopen("in.txt", "r", stdin);
    //freopen("out.txt","w",stdout);
#endif // LOCAL
    ios::sync_with_stdio(false);
    int N;
    cin>>N;
    while(N--)
    {
        int n;
        cin>>n;
        vector<int> v;
        v.clear();
        for(int i=0;i<n;i++)
        {
            int t;
            cin>>t;
            v.push_back(t);
        }
        sort(v.begin(),v.end());
        printf("%d",v[0]);
        for(vector<int>::iterator it=v.begin()+1;it!=v.end();it++)
        {
            printf(" %d",*it);
        }
        printf("\n");
    }
    return 0;
}