#include <iostream>
#include <string>
using namespace std;
int main(){
	string S;
	cin >> S;
	int N = S.size();
	bool ok = true;
	for (int i = 0; i < N; i++){
		if (S[i] != "AC,"[i % 3]){
			ok = false;
		}
	}
	if (ok){
		cout << "Done!" << endl;
	} else {
		cout << "Failed..." << endl;
	}
}