#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
// Welcome to my source code!

int main() {
    string s;
    cin >> s;
    int n = s.size();
    bool flag = true;
    for (int i = 0; i < n; i += 3) {
        if (s[i] != 'A') {
            flag = false;
            break;
        }
    }
    if (flag) cout << "Done!" << endl;
    else cout << "Failed..." << endl;
}