#include <iomanip>
#include <iostream>

using namespace std;

int main(int argc, char* argv[])
{
	int n = 0;
	string s;
	for (int n = 0; n <= 999; n++) {
		cout << setfill('0') << setw(3);
		cout << n << endl << flush;
		cin >> s;
		if (s == "unlocked") break;
	}
	return 0;
}