#include <bits/stdc++.h>
using namespace std;
#include <algorithm>
 
int main(){
  
  string a;
  cin >> a;
  string b;
  int muri = 0;
  int count1 = 0;
  int abcd = 0;
  int cou = count(a.begin(),a.end(),',');
  for(int i=1;i<=cou ;i++){
    int fi = a.find(",",abcd);
   	if(i==1)b = a.substr(0,fi);
    else b = a.substr(count1,fi);
    count1 += b.size()+1;
    // cout << b << endl << fi << endl;
    if(b!="AC"){
      muri++;
      break;
    }
    if(i==cou){
      if(a.substr(count1)!="AC") muri++;
    }
    abcd = fi;
  }
  if(cou==false){
    if(a=="AC")cout << "Done!";
    else cout << "Failed...";
  }
  else{
  if (muri==0)cout << "Done!";
  else cout << "Failed...";
  }
}