#include<iostream>
#include<string>
#include<iomanip>
#include<cmath>
#include<vector>
#include<algorithm>

using namespace std;

#define int long long
#define endl "\n"

constexpr long long INF = (long long)1e18;
constexpr long long MOD = 1'000'000'007; 

string yn(bool f){return f?"Yes":"No";}
string YN(bool f){return f?"YES":"NO";}



signed main(){
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	cout<<fixed<<setprecision(10);
	
	string s;
	
	cin>>s;
	
	if(s.size()%3){
		 cout<<"Failed..."<<endl;
	} else {
		bool flag = true;
		for(int i = 0; i < s.size(); i+= 3){
			if(s[i] != 'A') flag = false;
		}
		for(int i = 1; i < s.size(); i+= 3){
			if(s[i] != 'C') flag = false;
		}
		for(int i = 2; i < s.size(); i+= 3){
			if(s[i] != ',') flag = false;
		}
		
		if(flag) cout<<"Done!"<<endl;
		else cout<<"Failed..."<<endl;
	}
	
	
	return 0;
}