import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		for(int i = 0; i < 1000; i++) {
			String str = String.format("%03d", i);
			System.out.println(str);
			String r = scan.next();
			if(r.equals("unlocked")) {
				break;
			}
		}
		scan.close();
	}
}