#include <bits/stdc++.h>
#include <iostream>
#include <string>
#include <stdlib.h>
using namespace std;

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


}