import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import static java.lang.System.in;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        for (int i = 0; i < 1000; i++) {
            System.out.format("%03d%n",i);
            if (reader.readLine().equals("unlocked")) {
                break;
            }
        }
    }
}