#include<bits/stdc++.h>
typedef long long ll;
using namespace std;
int INF = 1e9;
int MOD = 1e9+7;
main(){
    string key = "0000000000",ans;
    int max,n;
    cout << key << endl;
    fflush(0);
    cin >> max >> ans;
    if(ans == "unlocked")return 0;
    for(int i = 0;i < 10;i++){
        for(int j = 1;j < 10;j++){
            key[i] = j + '0';
            cout << key << endl;
            fflush(0);
            cin >> n >> ans;
            if(ans == "unlocked")return 0;
            if(n > max){
                max = n;
                break;
            }
            if(n < max){
                key[i] = '0';
                break;
            }
        }
    }
}