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