#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <cmath>

#define FORR(i,b,e) for(int i=(b);i<(int)(e);++i)
#define FOR(i,e) FORR(i,0,e)
#define ALL(c) begin(c), end(c)
#define dump(var) cerr << #var ": " << var << "\n"
#define dumpc(con) for(auto& e: con) cerr << e << " "; cerr<<"\n"

using namespace std;


int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);


    string ans, x, res;
    int fm;

    ans = "0000000000";
    x = "0000000000";
    cout << x << endl;
    cin >> fm;
    getline(cin, res);

    FOR(i, 10) {
        FORR(j, 1, 10) {
            int m;
            x[i] = '0' + j;
            cout << x << endl;
            cin >> m;
            getline(cin, res);
            if (m == 10) {
                return 0;
            }
            else if (fm < m) {
                ans[i] = x[i];
                break;
            }
            else if (fm > m) {
                break;
            }
        }
        x[i] = '0';
    }
    cout << ans << endl;
    getline(cin, res);
    
    return 0;
}