#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <tuple>
#include <queue>
#include <deque>
#include <map>
#include <set>
#include <cmath>
#include <iomanip>
#define rep(i, n) for(int i = 0; i < (int)(n); ++i)
using namespace std;

int main(void) {
    string S;
    cin >> S;
    
    int i = 0;
    while (i < S.size()) {
        if (S[i] == ',') {
            ++i;
        } else if (S[i] == 'A') {
            i += 2;
        } else {
            cout << "Failed...\n";
            return 0;
        }
    }
    cout << "Done!\n";
    return 0;
}