#include <iostream>
#include <string>

using namespace std;

int main() {
	string key;
	for (int i = 0; i < 10; ++i) {
		int maxMatched = 0;
		int maxDigit = 0;
		for (int k = 0; k < 10; ++k) {
			string challenge = key;
			challenge.push_back('0' + k);
			if (key.size() < 9) {
				challenge.append(string(9 - key.size(), '0'));
			}
			cout << challenge << endl;
			int matched;
			string locked;
			cin >> matched >> locked;
			if (locked == "unlocked") {
				return 0;
			}
			if (matched > maxMatched) {
				maxDigit = k;
				maxMatched = matched;
			}
		}
		key.push_back('0' + maxDigit);
	}
	return 0;
}