#include<bits/stdc++.h>
using namespace std;
struct node{
	char name[101];
	int time;
}loy[101];
bool cmp(node a,node b)
{
	return a.time>b.time;
}
int main ()
{
	int t;
	scanf("%d",&t);
	int n;
	while(t--)
	{
		scanf("%d",&n);
		for(int i=0;i<n;++i)
		{
			scanf("%s %d",loy[i].name,&loy[i].time);
		}
		sort(loy,loy+n,cmp);
		for(int i=0;i<n;++i)
		{
			printf("%s\n",loy[i].name);
		}
	}
}