#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
signed main(){
  for(Int i=0;i<1000;i++){
    cout<<setfill('0')<<setw(3)<<i<<endl;
    string s;
    cin>>s;
    if(s=="unlocked") return 0;
  }
  return 0;
}