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