import java.io.*;
import java.util.*;


public class Main_yukicoder714 {

	private static Scanner sc;
	private static Printer pr;

	private static void solve() {
		int n = sc.nextInt();

		List<List<String>> order = new ArrayList<>(20);
		for (int i = 0; i < 20; i++) {
			order.add(new ArrayList<>());
		}
		
		for (int i = 0; i < n; i++) {
			int cmd = sc.nextInt();

			out:
			switch (cmd) {
			case 0:
				int nn = sc.nextInt();
				int mm = sc.nextInt();
				for (int j = 0; j < mm; j++) {
					order.get(nn - 1).add(sc.next());
				}
				break;
			case 1:
				String b = sc.next();
				for (int j = 0; j < 20; j++) {
					int index = order.get(j).indexOf(b);
					
					if (index >= 0) {
						order.get(j).remove(index);
						pr.println(j + 1);
						break out;
					}
				}

				pr.println(-1);
				break;
			case 2:
				int c = sc.nextInt();
				order.get(c - 1).clear();
				break;
			}
		}
	}

	// ---------------------------------------------------
	public static void main(String[] args) {
		sc = new Scanner(INPUT == null ? System.in : new ByteArrayInputStream(INPUT.getBytes()));
		pr = new Printer(System.out);

		solve();

//		pr.close();
		pr.flush();
//		sc.close();
	}

	static String INPUT = null;

	private static class Printer extends PrintWriter {
		Printer(OutputStream out) {
			super(out);
		}
	}
}