#include <bits/stdc++.h>

int main() {
  std::string str;

  std::string res = "0000000000";
  for(int i = 0; i < 10; ++i) {
    int maxj = 0;
    int max = -1;
    int x;
    for(int j = 0; j < 10; ++j) {
      res[i] = (char)(j + '0');
      std::cout << res << std::endl;
      std::cin >> x >> str;
      if( max < x ) {
        max = x;
        maxj = j;
      }
      if( str == "unlocked" ) return 0;
    }
    res[i] = (char)(maxj + '0');      
  }
            

  return 0;
}