#include <iostream>
#include <string>
#define llint long long

using namespace std;

string s;

int main(void)
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> s;
	for(int i = 0; i < s.size(); i++){
		if(s[i] != 'A' && s[i] != 'C' && s[i] != ','){
			cout << "Failed..." << endl;
			return 0;
		}
	}
	cout << "Done!" << endl;
	
	return 0;
}