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

int main() {
  string S; cin >> S;
  sort(S.begin(), S.end());
  for(int i = 0; i < (int)S.size(); i++){
    if(!(S[i] == 'A' or S[i] == 'C' or S[i] == ',')){
      cout << "Failed..." << endl;
      return 0;
    }
  }
  cout << "Done!" << endl;
}