import java.util.*;

public class Exercise46{
  public static void main (String[] args){

    Scanner sc = new Scanner(System.in);

    String[] num = new String[1000];
    for (int i = 0; i < 1000; i++){
      if(i < 10){
        num[i] = "00" + i;
      }else if(i > 9 && i < 100){
        num[i] = "0" + i;
      }else{
        num[i] = String.valueOf(i);
      }
    }

    int a = 0;
    while (true){
      System.out.println(num[a]);
      System.out.flush();

      String result = sc.next();

      if (result == "unlocked"){
        break;
      }else{
        a++;
      }
    }
  }
}