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