#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstdlib>
#include<vector>
#include<map>
#include<queue>
#include<string>
#include<sstream>
#include<cmath>
#include<numeric>
using namespace std;

int main(){

  int cnt = 0;
  while(true){
    if( cnt < 10 ) cout << "00" << cnt << endl;
    else if( cnt < 100 ) cout << "0" << cnt << endl;
    else cout << cnt << endl;

    string s;
    cin >> s;
    if( s == "unlocked" ) break;

    cnt++;
  }

  return 0;
}