  H   H H   H  
    T T T T    
  T T H   H T T  
T T T T T T T T T T T T
     T T     
 T T   T T   T T 
 T T   T T   T T 
     T T     
T T T T T T T T T T T T
  T T H   H T T  
    T T T T    
  H   H H   H  
