#include <iostream>
using namespace std;
int main() {
    int n; cin >> n;
    bool f = false, s = false;
    while (n > 0) {
        if (n % 10 == 4) f = true;
        if (n % 10 == 6) s = true;
        n /= 10;
    }
    cout << (f && s ? "Beautiful\n" : "...\n");
}