#include<bits/stdc++.h>
using namespace std;
using Int = long long;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}


vector<string> split(string& s,char c){
  Int n=s.size();
  vector<string> res;
  for(Int i=0;i<n;i++){
    if(s[i]==c) continue;
    string t;
    while(i<n&&s[i]!=c) t.push_back(s[i++]);
    res.push_back(t);
  }
  return res;
}

//INSERT ABOVE HERE
signed main(){
  string s;
  cin>>s;
  auto ss=split(s,',');
  cout<<(ss==vector<string>(ss.size(),"AC")?"Done!":"Failed...")<<endl;
  return 0;
}