#include "bits/stdc++.h"
using namespace std;

int main() {
	string S;
	cin >> S;
	for (int i = 0; i < S.size() - 1; i+=3) {
		if (S.substr(i, 2) != "AC") {
			cout << "Failed..." << endl;
			return 0;
		}
	}
	cout << "Done!" << endl;
}