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

int main() {
    string str;
    cin >> str;
    bool flag;
    for(int i = 0; i < str.length(); i++) {
        if(str[i] != 'A' || str[i] != 'C' || str[i] != ',') {
            flag = false;
        }else {
            flag = true;
        }
    }
    if(flag) {
        cout << "Done!" << endl;
    }else {
        cout << "Failed..." << endl;
    }
}