#include <iostream>
#include <string>

void solve() {
    std::string s;
    std::cin >> s;

    for (auto c : s) {
        if (c != 'A' && c != 'C' && c != ',') {
            std::cout << "Failed..." << std::endl;
            return;
        }
    }

    std::cout << "Done!" << std::endl;
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}