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