#include <bits/stdc++.h>
using namespace std;

int main() {
    string s;
    cin >> s;
    for (char c : s) {
        if (c != 'A' && c != 'C' && c != ',') {
            cout << "Failed..." << endl;
            return 0;
        }
    }
    cout << "Done!" << endl;
}