#include <iostream>
using namespace std;

int main(void) {
    int n;
    cin >> n;
    bool exist4 = 0, exist6 = 0;
    while (n > 0) {
        int num = n % 10;
        n /= 10;
        if (num == 4) exist4 = 1;
        else if (num == 6) exist6 = 1;
        if (exist4 && exist6) break;
    }
    
    cout << (exist4 && exist6 ? "Beautiful" : "...") << endl;
    return 0;
}