#include <bits/stdc++.h>
using namespace std;

#define int long long

signed main(){
  int ans = 0;
  for( int i = ( int ) 1e9; i; i /= 10 ){
    vector< int > match( 10 );
    for( int j = 0; j < 10; ++j ){
      cout << setw( 10 ) << setfill( '0' ) << j * i << endl;
      int m; string r; cin >> m >> r;
      if( r == "unlocked" )
        exit( 0 );
      match[ j ] = m;
    }
    ans = ans * 10 + max_element( match.begin(), match.end() ) - match.begin();
  }
  cout << setw( 10 ) << setfill( '0' ) << ans << endl;
  int m; string r; cin >> m >> r;
  return 0;
}