#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  string S;
  cin>>S;
  for(int i=0;i<S.size();i++){
    if(S[i] == 'A' || S[i] == 'C' || S[i] == ',') continue;
    cout<<"Failed..."<<endl;
    return 0;
  }
  cout<<"Done!"<<endl;
}