.  #  .#.
      #         #... .
    ## ..     ..##.#. 
    #..    # # .. #.. 
    ......... #.    #.
    #.## #  ....#. .  
    #.#.....### #..  .
    #.#. ..##  #..###.
      ..  ..######{.# 
   ###..#. .#.#. .##. 
  .. ## #........#   #
.  .  . ###. ##.#.    
..##.#..####....#     
 .... ##.....#  ....  
   ...#.## ..#     #  
    #.#...#..#        
     #..##...##       
 {   ##....#..#       
  #. ##......##       
 ..........#..#       
 . ......3....#       
 #............##      
 #....#.#..§##.#      
 ..###..#..#§.##      
 #.  ###..##∩##       
       ######.#       
             .#  {    
             ..       
             ##.      
               .#     
                #