#include<iostream>
#include<string>
using namespace std;
int main(){
	string key(10, 'a');
	string reply;
	int x;
	for (int i = 0; i < 10; i++){
		for (int j = 0; j < 10; j++){
			key[i] = '0' + j;
			cout << key << endl;
			cin >> x >> reply;
			if (x == i+1) break;
		}
	}
	return 0;
}