#include <iostream>
#include <random>
using namespace std;
int main(){
	mt19937 mt(114514);
	uniform_int_distribution<int> dstr(0,999);

	char buff[10];
	while(1){
		sprintf(buff, "%03d", dstr(mt));
		cout << buff << endl;

		string tmp;
		cin >> tmp;
		if(tmp == "unlocked"){
			return 0;
		}

	}
	
	return 0;
}