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