import java.util.*;

public class Main {
	public static void main(String args[]) {
		Scanner scan = new Scanner(System.in);

		int n = scan.hasNextInt() ? scan.nextInt() : -1;
		double c = Math.pow(10, 9);
		if (n > c || n < 1) {
			System.out.println("入力エラー");
			return;
		}

		if (Integer.toString(n).contains("4") && Integer.toString(n).contains("6") ) {
			System.out.println("Beautiful");
		} else {
			System.out.println("...");
		}
	}
}