#include <bits/stdc++.h>
using namespace std;

int main() {
	string S; cin >> S;
	int N = S.size();
	bool f4 = false, f6 = false;
	for (int i = 0; i < N; i++) {
		if (S[i] == '4') f4 = true;
		if (S[i] == '6') f6 = true;
	}
	if (f4 && f6) cout << "Beautiful" << endl;
	else cout << "..." << endl;
}