import java.util.Scanner;

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

		for(int i = 0; i < 1000; i++){
			System.out.printf("%03d\r\n",i);
			if(sc.next().equals("unlocked")){
				break;
			}
		}

		sc.close();
	}
}