#include <iostream>
#include <cassert>

using namespace std;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);

  int N; cin >> N;
  bool four = false, six = false;
  while (N > 0) {
    int tmp = N % 10;
    N /= 10;
    four |= tmp == 4;
    six |= tmp == 6;
  }
  cout << (four && six? "Beautiful": "...") << endl;
  return 0;
}