#include<iostream>
#include<algorithm>
using namespace std;
struct loy
{
    char n[30];
    int m;
}arr[105];
bool cmp(loy a,loy b)
{
    return a.m>b.m;
}
int main()
{
    int t,i,n;
    cin>>t;
    while(t--)
    {
        cin>>n;
        for(i=0;i<n;i++)
        cin>>arr[i].n>>arr[i].m;
        sort(arr,arr+n,cmp);
        for(i=0;i<n;i++)
        cout<<arr[i].n<<endl;
    }
}