#include <iostream>
#include <vector>
#include <string>
#include <cstring>
#include <math.h>
#include <cmath>
#include <limits.h>
#include <map>
#include <set>
#include <queue>
#include <algorithm>
#include <functional>
#include <stdio.h>
using namespace std;

long long MOD = 1000000007;

int main() {
    
    string ans = "0000000000";
    for ( int i = 0; i < 10; i++) {
        int xm = -1;
        int a;
        for ( int j = 0; j < 10; j++) {
            ans[i] = '0' + j;
            cout << ans << endl;
            int x;
            cin >> x;
            string s;
            cin >> s;
            if ( s == "unlocked" ) { return 0; }
            if ( xm < x ) {
                xm = x;
                a = j;
            }
        }
        ans[i] = '0' + a;
    }
    return 0;
}