#include<iostream>
#include <algorithm>
#include<string>
#include <bitset>
#include <vector>
#include <functional>
#include <climits>
#include <iomanip>
using namespace std;
int main()
{

	//int a = 0, b = 0, c = 0, d = 0, e = 0, f = 0, g = 0, h = 0, ans = 0;
	long long a = 0, b = 0, c = 0, d = 0, e = 0, f = 0, g = 0, h = 0, i = 0, j = 0, k = 0, l = 0, ans = 0;
	//cout << LONG_MAX << endl;
	//string s[1001];
	//long long n, A[1000000000];
	long long n, m;
	string s[21][11];
	cin >> n;
	int ni, mi;
	string bi;
	for (a = 0; a < n; a++)
	{
		cin >> m;
		if (m == 0)
		{
			cin >> ni;
			cin >> mi;

			for (b = 0; b < mi; b++)
			{
				cin >> s[ni][b];
			}
		}
		if (m == 1)
		{
			cin >> bi;
			d = 0;
			for (b = 0; b < 20; b++)
			{
				for (c = 0; c < 10; c++)
				{
					if (bi == s[b][c])
					{
						cout << b << endl;
						s[b][c] = "";
						b = 20;
						d = 1;
						break;
					}
				}
			}
			if (d==0)
			{
				cout << -1 << endl;
			}
		}
		if (m == 2)
		{
			cin >> mi;
			for ( b = 0; b < 10; b++)
			{
				s[mi][b] = " ";
			}
		}
	}
	//std::cout << std::fixed;
	//cout << std::setprecision(20) << << endl;
	//cout << d << endl;

	return 0;
}