#include<iostream>
#include<string>
using namespace std;
int main() {
	for (char i = '0'; i <= '9'; i++) {
		for (char j = '0'; j <= '9'; j++) {
			for (char k = '0'; k <= '9'; k++) {
				cout << i << j << k << endl << flush;
				string s;
				cin >> s;
				if (s[0] == 'u')return 0;
			}
		}
	}
}