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

using namespace std;

int main(void) {
	for (int i = 0; i < 1000; ++i) {
		printf("%03d\n", i);
		string str; cin >> str;
		if (str == "unlocked") {
			return 0;
		}
	}
	return 0;
}