#include <iostream>
#include <string>
using namespace std;

int main() {
    bool ans = false;
    for(int i = 0;i < 10;i++){
        for(int j = 0;j < 10;j++){
            for(int k = 0;k < 10;k++){
                cout << i << j << k << endl;
                string fb;
                cin >> fb;
                if(fb == "unlocked")ans = true;
                if(ans)break;
            }
        if(ans)break;
        }
    if(ans)break;
    }
return 0;
}