#include <bits/stdc++.h>
#include <atcoder/all>
#include <boost/multiprecision/cpp_int.hpp>
using namespace std;
using namespace atcoder;
using namespace boost::multiprecision;

void solve() {
    string N;
    cin >> N;
    bool flg1 = false, flg2 = false;
    for (int i = 0; i < (int)N.size(); i++) {
        if (N[i] == '4') {
            flg1 = true;
        }
        if (N[i] == '6') {
            flg2 = true;
        }
    }
    if (flg1 && flg2) {
        cout << "Beautiful" << endl;
    } else {
        cout << "..." << endl;
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    solve();
    return 0;
}