#include <bits/stdc++.h>

using std::cin;
using std::cout;
using std::string;

int main() {
	string s;
	cin >> s;
	
	bool c4 = false, c6 = false;
	for (char c : s) {
		if (c == '4') c4 = true;
		if (c == '6') c6 = true;
	}
	
	if (c4 and c6) puts("Beautiful");
	else puts("...");
	
	return 0;
}