import java.io.*;
import java.util.*;

class Main
{
    public static void main(String args[])throws Exception
    {
        BufferedReader bu=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb=new StringBuilder();
        String s=bu.readLine();
        boolean f=false,si=false;
        for(int i=0;i<s.length();i++)
        {
            f|=s.charAt(i)=='4';
            si|=s.charAt(i)=='6';
        }
        if(f && si) sb.append("Beautiful");
        else sb.append("...");
        System.out.println(sb);
    }
}