#include <bits/stdc++.h>
using namespace std;
void solve() {
	int m, q, n;
	cin >> m >> q >> n;
	vector<string> name(n);
	map<string, int> id;
	for (int i = 0; i < n; i++) {
		cin >> name[i];
		id[name[i]] = i;
	}
	vector<int> mask(n);
	for (int i = 0; i < q; i++) {
		int k;
		cin >> k;
		while (k--) {
			string s;
			cin >> s;
			mask[id[s]] |= (1 << i);
		}
	}
	vector<int> mp(1 << q, -1);
	for (int i = 0; i < n; i++) {
		int &x = mp[mask[i]];
		if (x == -1) x = i;
		else if (x != -2) x = -2;
	}
	while (m--) {
		int s = 0;
		for (int i = 0, x; i < q; i++) {
			cin >> x;
			s |= (x << i);
		}
		if (mp[s] < 0) {
			cout << "Let's go to the library!!" << "\n";
		} else {
			cout << name[mp[s]] << "\n";
		}
	}
}
int main() {
	cin.tie(0)->sync_with_stdio(0);
	int t;
	cin >> t;
	while (t--) {
		solve();
	}
	return 0;
}