#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;
	}
}