#define _CRT_SECURE_NO_WARNINGS
#include "bits/stdc++.h"
#define rep(i,n) for(int i = 0;i < n;i++)
#define P(p) cout<<(p)<<endl;
using namespace std;
typedef long long ll;
int dx[] = { 0, 1, 0, -1 };
int dy[] = { -1, 0, 1, 0 };

int sttoi(std::string str) {
	int ret;
	std::stringstream ss; ss << str;
	ss >> ret;
	return ret;
}

ll gcd(ll a, ll b){
	if (b > a)swap(a, b); if (b == 0)return a; else{ return gcd(b, a%b); }
}

void solve() {
	string s = "XXXXXXXXXX";
	int ansnum;
	string ans;
	int count = 0;
	for (int i = 0; i < 10; i++){
		for (int j = 0; j < 10; j++){
			if (s[i] == 'X'){
				s[i] = '0'+j;
				cout << s << endl;
				cin >> ansnum >> ans;
				if (ansnum > count){
					count++;
				}
				else{
					s[i] = 'X';
				}
			}
		}
	}
}

int main() {
	solve();
	return 0;
}