/**
 *  author:   TakeruOkuyama
 *  created:  2020-04-09 13:18:37
**/
#include <bits/stdc++.h>
#define rep(i, n) for(int i = 0; i < (n); i++)
using namespace std;
using ll = long long;
using P = pair<int, int>;

int main(){
    string S;
    cin >> S;
    rep(i, S.size()){
        if(S[i] != 'A' && S[i] != 'C' && S[i] != ','){
            cout << "Failed..." << endl;
            return 0;
        }
    }
    cout << "Done!" << endl;
return 0;}

/**
**/