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