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

int main() {
  string s;
  cin >> s;
  string ans = "Done!";
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == 'A') i++;
    else if (s[i] == ',') continue;
    else {
      ans = "Failed...";
      break;
    }
  }
  cout << ans << endl;
  return 0;
}