...    
          ....    
          ...#   .
  #       #..#  .#
  #.      #..##...
####.     #.....  
......#####..#    
......<......#    
.......####<.#    
.....#.   ##.#    
.... #.    #.#    
...  ##    #.#    
##         #.#    
           #a#    
           #z#    
           #.#    
           #.#    
           #.#    
           #.#    
           #.#    
           .W.    
           ..#    
           ..#