cheng2, ~{3I~}
        8       
        8 8     
        8  8    
  888888888888  
  8     8       
  8     8       
  8     8    8  
  88888  8   8  
  8   8  8  8   
  8   8  8  8   
  8   8   88    
  8 8 8   8     
  8  8   88   8 
 8      8  8  8 
8      8    8 8 
             88