...            
         .  . .. #.        
   #    ..# #.u.#..#       
    . #  ..# .....# #      
     .# ..   ...u# ...     
      #.#.. .....u#..      
   #  '#. . .....u.########
. # .    #.....#..........#
       ...................#
 #   ... . . ........4....#
   #... .. ...............#
  .   .   . ...#....#.#####
   ##... ## ..###...#.#    
       ..#... .#....#.#    
   ...   .. . ......#.#    
   . . ...  . ..... #.#    
      .....  ... ...#.#    
       . #. . .# ...#.#    
                 ...#