@           @@@     @@  
  @@                       
 @ @    @@   @@@@@   @@@   
@  @   @  @  @      @   @  
@@@@@  @  @  @ @@   @   @  
   @    @@@  @@  @   @@@   
   @      @      @  @   @  
          @  @   @  @   @  
@  @@  @@@    @@@    @@@