#include <bits/stdc++.h>

using namespace std;

int main() {
	string s;
	cin >> s;

	bool ok = true;
	for (int i = 0; i < s.size(); i++) {
		if (s[i] != 'A' && s[i] != 'C' && s[i] != ',') {
			ok = false;
			break;
		}
	}

	if (ok) {
		puts("Done!");
	} else {
		puts("Failed...");
	}

	return 0;
}