#include <bits/stdc++.h>
#define rep(i, l, r) for (int i = (l); i < (r); i++)
using namespace std;

typedef long long ll;

int main() {
    string N;
    cin >> N;
    bool a = false, b = false;
    for (char c : N) {
        if (c == '4') a = true;
        if (c == '6') b = true;
    }
    if (a && b) cout << "Beautiful\n";
    else cout << "...\n";
}