#include "bits/stdc++.h"

using namespace std;

using ll = long long;
using ld = long double;

const double PI = 3.1415926535897932384626433832795;

const int dx[] = { 0, 1, 0, -1 };
const int dy[] = { -1, 0, 1, 0 };

int gcd(int x, int y) { return y ? gcd(y, x % y) : abs(x); }
ll gcd(ll x, ll y) { return y ? gcd(y, x % y) : abs(x); }
int lcm(int x, int y) { return x / gcd(x, y) * y; }
ll lcm(ll x, ll y) { return x / gcd(x, y) * y; }

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);

	int n;
	cin >> n;

	vector<map<string, int>> vecMp(21);
	for (int i = 0; i < n; i++) {
		int mode;
		cin >> mode;

		if (mode == 0) {
			int seat, m;
			cin >> seat >> m;
			seat--;

			for (int j = 0; j < m; j++) {
				string sushiName;
				cin >> sushiName;
				vecMp[seat][sushiName]++;
			}
		} else if (mode == 1) {
			string b;
			cin >> b;

			int eatIndex = -1;
			for (int j = 0; j < (int)vecMp.size(); j++) {
				if (!vecMp[j][b]) {
					continue;
				}

				vecMp[j][b]--;
				eatIndex = j;
				break;
			}

			cout << (eatIndex == -1 ? eatIndex : eatIndex + 1) << endl;
		} else if (mode == 2) {
			int c;
			cin >> c;
			c--;

			vecMp[c].clear();
		}
	}
	return 0;
}