#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstring>
#include <cstdlib>
#include <cmath>
using namespace std;
using ll = long long;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    string s;
    cin >> s;
    int n = s.size();

    if ((n + 1) % 3 != 0) {
        cout << "Failed..." << endl;
        exit(0);
    }

    int b = 1;
    char c[4] = "AC,";
    for (int i = 0; i < n; i++) {
        if (s[i] != c[i % 3]) b = 0;
    }
    cout << (b ? "Done!" : "Failed...") << endl;


    return 0;
}