import java.util.*;
import java.util.Map.Entry;
import java.math.*;
import java.awt.geom.*;
import java.io.*;
      
      
public class Main {	

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		for(int i = 0; i < 1000; i++) {
			String say = String.valueOf(i);
			String aa = "";
			for(int j = say.length(); j < 3; j++) {
				aa += "0";
			}
			aa += say;
			System.out.println(aa);
			String ans = sc.next();
			if(ans.equals("unlocked")) break;
		}
	}
	
}