#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 four = false, six = false;
    for(char c : N){
        if(c == '4') four = true;
        if(c == '6') six = true;
    }
    cout << (four & six ? "Beautiful" : "...") << endl;

    return 0;
}