import java.util.*;

public class Main{
  
  public static void main(String[] args){
    
    Scanner sc = new Scanner(System.in);
    String num = sc.next();
    
    int len = num.length();
    boolean is4 = false;
    boolean is6 = false;
    
    for(int i=0; i<len; i++){
      if(num.charAt(i)=='4'){
        is4 = true;
      }
      if(num.charAt(i)=='6'){
        is6 = true;
      }
    }
    
    if(is4 && is6){
      System.out.println("Beautiful");
    }else{
      System.out.println("...");
    }
  
  }

}