#include<bits/stdc++.h>
#define rep(i, x) for(ll i = 0; i < x; i++)
#define rep2(i, x) for(ll i = 1; i <= x; i++)
#define all(a) (a).begin(),(a).end()
using ll = long long;
using ld = long double;
using namespace std;
signed main() {
	string s; cin >> s;
	rep(i, s.size()) {
		if (s[i] != 'A' && s[i] != 'C' && s[i] != ',') { cout << "Failed...\n"; return 0; }
	}
	cout << "Done!\n";
	return 0;
}