#include <iostream>
#include <iomanip>

using namespace std;

int main() {
  string line;
  cout << setw(3);
  cout.fill('0');
  for ( int i = 0; i < 1000; i++ )
  {
	cout << i << endl;
	getline( cin, line );
	if ( line == "unlocked" ) {
	  break;
	}
  }
}