# include <iostream>
# include <iomanip>

using namespace std;


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

    bool is_4 = false;
    bool is_6 = false;

    for (int i = 0; i < n.length(); i++) {
        if (!is_4 && n[i] == '4') {
            is_4 = true;
        }
        if (!is_6 && n[i] == '6') {
            is_6 = true;
        }
        if (is_4 && is_6) {
            break;
        }
    }

    if (is_4 && is_6) {
        cout << "Beautiful" << endl;
    }else {
        cout << "..." << endl;
    }

}