#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <string>
#include <iostream>
#include <cctype>
#include <map>
using namespace std;
map<string,int> hash;
int T,N;
string str;
int main()
{
	freopen("nickname.in","r",stdin);
	freopen("nickname.out","w",stdout);
	scanf("%d\n",&T);
	map<string,int>::iterator iter;
	for(int i=1;i<=T;i++)
	{
		scanf("%d\n",&N);
		for(int j=1;j<=N;j++)
		{
			getline(cin,str);
			for(unsigned int i=0;i<str.length();i++) str[i]=tolower(str[i]);
			hash[str]++;
		}
		iter=hash.begin();
		for(;iter!=hash.end();iter++) printf("%s %d\n",iter->first.data(),iter->second);
		hash.clear();  printf("\n");
	}
	return 0;
}