4  2         
       .   ...      
      ..    ...     
      #.  ......    
  # ###.  ......    
   ##.#.  ...       
 #  ....##..#       
##.##.##...#  #     
 ......#...#   #    
  #.##.#.##  #.#    
   #3#.4#4##..#     
    #3Y*Yx....#     
    ##.##.##. ..#   
     ...##.# .z##   
 # ..###.###  zz. . 
 ##.. # #..  . ..#  
 #.#     #.#.#  .  #
 ##       .# .    . 
           .   .    
         .#     #   
     .   .   .  .   
         #  #  #    
           #