#include <bits/stdc++.h>
using namespace std;

int main() {
  string S, ans = "Done!";
  cin >> S;
  for (int i = 0; i < S.size(); i++)
    if (S.at(i) != 'A' && S.at(i) != 'C' && S.at(i) != ',') ans = "Failed...";
  cout << ans << "\n";
}