// yukicoder No.932
#include <bits/stdc++.h>
using namespace std;

int main()
{
  string s; cin >> s;

  bool flag = true;
  for(int i = 0; i < s.size(); ++i) {
    if(s[i]=='A' || s[i]==',' || s[i]=='C') continue;
    else {
      flag = false;
      break;
    }
  }

  if(flag) cout << "Done!" << "\n";
  else cout << "Failed..." << "\n";

  return 0;
}