#include <iostream>
using namespace std;

int main(){
	string ans = "",gomi;
	for(int digit = 0;digit < 10;digit++){
		for(int i = 0,x,keep;i < 10;i++){
			for(int j = 0;j < digit;j++) cout << '0';
			cout << i;
			for(int j = digit + 1;j < 10;j++) cout << '0';
			cout << endl;
			cin >> x >> gomi;
			if(x == 10) return 0;
			if(i == 0) keep = x;
			else if(x > keep){
				ans += to_string(i);
				break;
			}else if(x < keep){
				ans += to_string(i - 1);
				break;
			}
		}
	}
	cout << ans << endl;
}