#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define fi first
#define se second
#define all(a) a.begin(),a.end()
int main(){
  string n;
  cin >> n;
  bool is4=false, is6=false;
  for(char &i:n){
    if(i=='4') is4=true;
    if(i=='6') is6=true;
  }
  if(is4 && is6) cout << "Beautiful\n";
  else cout << "...\n";
  return 0;
}