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