dao4, ~{5=~}
       8     8  
 88888888    8  
    8        8  
   8      8  8  
  8   8   8  8  
 8     8  8  8  
 88888888 8  8  
    8   8 8  8  
    8     8  8  
    8     8  8  
 8888888  8  8  
    8     8  8  
    8        8  
    88888    8  
88888      888  
 8          8