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

int main() {
  ios::sync_with_stdio(false);

  string S;
  cin >> S;

  for (int i = 0; i + 2 <= S.size(); i += 2) {
    if (S[i] == ',') ++i;
    if (S.substr(i, 2) != "AC") {
      cout << "Failed..." << endl;
      return 0;
    }
  }

  cout << "Done!" << endl;

  return 0;
}