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

string replaceWord(string s, const string o, const string n) {
  string::size_type pos = s.find(o);
  string::size_type size = o.size();
  while (pos != string::npos) {
    s = s.replace(pos, size, n);
    pos = s.find(o);
  }
  return s;
}

void solve() {
  string s;
  cin >> s;
  s = replaceWord(s, "AC", "");
  s = replaceWord(s, ",", "");

  cout << ((s.size()) ? "Failed..." : "Done!") << endl;
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  solve();
  getchar();
}