#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(v) v.begin(),v.end()
typedef long long ll;
#define int ll
using vi = vector<int>;
using vs = vector<string>;
using P = pair<int,int>;
template<typename T> bool chmax(T &a, const T b) {if (a < b) {a = b; return true;} else return false; }
template<typename T> bool chmin(T &a, const T b) {if (a > b) {a = b; return true;} else return false; }
const int INF = 1e18;

signed main() {
   cin.tie(0);
   ios_base::sync_with_stdio(false);
   cout << fixed << setprecision(20);

   string n;cin>>n;
   set<char> st;
   for(char c:n)st.insert(c);

   cout << (st.count('4')&&st.count('6')?"Beautiful":"...") <<"\n";
   return 0;
}