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


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