import java.util.Scanner;

public class No_304 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		for (int i = 0; i <= 999; i++) {
			System.out.printf("%03d\n", i);
			if (sc.next().equals("unlocked")) {
				break;
			}
		}
		sc.close();

	}

}