#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main() {
  string s; cin >> s;
  bool flag =true;
  for(int i=0;i<s.size();i++){
    if(i%3==0){
      if(s[i]!='A'){
        flag = false;
       
        }
    }else if(i%3==1){
      if(s[i]!='C'){
        flag = false;
        
      }
    }else{
      if(s[i]!=','){
        flag =false;
     
        }
    }
  }
    if(flag == true){
      cout << "Done!"<<endl;
    }else{
      cout << "Failed..." <<endl;
    }
  
}