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