#include <iostream>
#include <cstdio>
#include <vector>
#include <string>

using namespace std;

int main() {
	string val = string(10, '0');

	string stat;
	int x;
	int hit;


	cout << val << endl;
	cin >> x >> stat;
	if (x == 10) {
		return 0;
	}

	hit = x;

	for (int i = 0; i < val.size(); i++) {
		for (char c = '0'; c <= '9'; c++) {
			val[i] = c;

			cout << val << endl;
			cin >> x >> stat;
			if (x == 10) {
				return 0;
			} else if (x > hit) {
				hit = x;
				break;
			} else if (x < hit) {
				val[i] = '0';
				break;
			}

		}
	}

	cout << val << endl;
	return 0;
}