#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for(ll i = 0, i##_len = (n); i < i##_len; i++)
#define reps(i, s, n) for(ll i = (s), i##_len = (n); i < i##_len; i++)
#define rrep(i, n) for(ll i = (n) - 1; i >= 0; i--)
#define rreps(i, e, n) for(ll i = (n) - 1; i >= (e); i--)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((ll)(x).size())
#define len(x) ((ll)(x).length())

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    // std::ifstream in("input.txt");
    // std::cin.rdbuf(in.rdbuf());
    string s;
    cin >> s;
    string tmp = "";
    rep(i, len(s)) {
        if (s[i] == ',') {
            if (tmp != "AC") {
                cout << "Failed..." << endl;
                return 0;
            }
            tmp = "";
        }
        else {
            tmp += s[i];
        }
    }
    if (tmp != "") {
        if (tmp != "AC") {
            cout << "Failed..." << endl;
            return 0;
        }
    }
    cout << "Done!" << endl;
    return 0;
}