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