#include <iostream>
using namespace std;

int main() {
	int i=1;
	string ans;
	cout << "000" << endl;
	cin >> ans;
	while(ans=="locked"){
		if(i<10){
			cout << "00" << i << endl;
		}else if(i<100){
			cout << "0" << i << endl;
		}else{
			cout << i << endl;
		}
		cin >> ans;
		i++;
	}
	return 0;
}