#include <iomanip>
#include <ios>
#include <iostream>

int main() {
  std::string s;
  for (int i = 0; i < 1000; ++i) {
    std::cout << std::setfill('0') << std::right << std::setw(3) << i
              << std::endl;
    std::cin >> s;
    if (s == "unlocked") break;
  }
}