#include<iostream>

using namespace std;

int main() {
    string s;
    cin >> s;

    if(s.at(0) != 'A') {
        cout << "Failed..." << endl;
        return 0;      
    }

    for(int i=0; i<s.size(); i++) {

        if(s.at(i) == ',') {
            if(s.at(i+1) != 'A') {
                cout << "Failed..." << endl;
                return 0;
            }
        }
    }

    cout << "Done!" << endl;
    return 0;
}