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