#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;

struct Cad
{
	int race;
	string name;
};

bool valid(const string& vote, const vector<Cad>& rgc, int r)
{
	vector<bool> voted(r, false);
	for (int z=0; z<vote.size(); ++z)
		if (vote[z]=='x')
			if (voted[rgc[z].race-1]==true)
				return false;
			else
				voted[rgc[z].race-1]=true;

	return true;
}

void countv(const string& vote, vector<int>& rgvote)
{
	for (int z=0; z<vote.size(); ++z)
		if (vote[z]=='x') ++rgvote[z];
}

void printwinner(const vector<Cad>& rgc, const vector<int>& rgvote, int r)
{
	vector< vector<int> > winner( r );
	vector< int > highest( r , -1 );
	for (int z=0; z<rgc.size(); ++z) {
		if (rgvote[z]>highest[rgc[z].race-1]) {
			winner[rgc[z].race-1].clear();
			winner[rgc[z].race-1].push_back(z);
			highest[rgc[z].race-1]=rgvote[z];
		}
		else if (rgvote[z]==highest[rgc[z].race-1]) {
			winner[rgc[z].race-1].push_back(z);
		}
	}
	vector<bool> rgwinner(rgc.size(), false);
	for (int i=0; i<winner.size(); ++i)
		for (int j=0; j<winner[i].size(); ++j)
			rgwinner[winner[i][j]]=true;
	for (int z=0; z<rgwinner.size(); ++z)
		if (rgwinner[z])
			cout<<rgc[z].name<<endl;
}

int main()
{
	ifstream ifile("winner.in");
	int K;	ifile>>K;
	for (int k=1; k<=K; ++k) {
		cout<<"Data Set "<<k<<':'<<endl;
		int n,r,v;	ifile>>n>>r>>v;
		vector< Cad > rgc(n);
		for (int i=0; i<n; ++i) {
			ifile>>rgc[i].race; ifile.ignore(1);
			getline(ifile, rgc[i].name);
		}
		vector<int> rgvote(n,0);
		for (int i=0; i<v; ++i) {
			string vote;
			getline(ifile, vote);
			if (valid(vote, rgc, r))
				countv(vote, rgvote);
		}
		printwinner(rgc, rgvote, r);
	}

}