#include <iostream>
#include <list>
#include <vector>
#include <string>
#include <stdio.h>
#include <stdint.h>
#include <iomanip>
using namespace std;

using uint = unsigned int;
using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define GETLINE( A ) string A; getline( cin , A ) 
#define FOR_ITR( ARRAY , ITR , END ) for( auto ITR = ARRAY .begin() , END = ARRAY .end() ; ITR != END ; ITR ++ ) 

int main()
{

  GETLINE( S );
  S = "," + S;
  const uint size = S.size();

  for( uint i = 0 ; i < size ; i++ ){

    if( S.substr( i , 1 ) == "," ){

      i++;
      
      if( S.substr( i , 1 ) != "A" ){

	cout << "Failed..." << endl;
	return 0;

      }

      i++;

    }
    

  }
  
  cout << "Done!" << endl;
  return 0;

}