#include <iostream>
#include <string>
using namespace std;

int main() {
  string s;
  cin >> s;
  for (int i = 0; i < s.size(); i++) {
    if (s[i] == 'L' || s[i] == 'W') {
      cout << "Failed..." << endl;
      return 0;
    }
  }
  cout << "Done!" << endl;
}