#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)

int main(){
    string N;
    cin >> N;

    bool f4 = false, f6 = false;
    for(char &c : N){
        if(c == '4') f4 = true;
        if(c == '6') f6 = true;
    }
    cout << ((f4 && f6) ? "Beautiful" : "...") << endl;
    
    return 0;
}