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