#include <iostream>
#include <cstdio>
#include <string>

using namespace std;

int main() {
	string ret;

	int n = 0;

	while(1) {
		printf("%03d\n", n);
		cin >> ret;

		if (ret == "unlocked") {
			break;
		}
		n++;
	}
	return 0;
}