import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int test = 0;
    while(true) {
      String num = "";
      if(test < 10) {
        num = "00" + String.valueOf(test);
      } else if(test < 100) {
        num = "0" + String.valueOf(test);
      } else {
        num = String.valueOf(test);
      }
      test++;
      System.out.println(num);
      String ret = sc.next();
      if(ret.equals("unlocked")) break;
    }
  }
}