#include <bits/stdc++.h>
using namespace std;
#define int int64_t

int32_t main() {
      string n;
      cin >> n;

      bool f = false;
      bool s = false;
      for (auto c : n) {
            if (c == '4') f = true;
            else if (c == '6') s = true;
      }

      if (f and s) cout << "Beautiful" << endl;
      else cout << "..." << endl;
}