.            
            . #.   .               
             .. .    #       .     
         .  #.. ..  .##   # .      
          #. .   .# #.# # . ..     
   .        .     .# ...#. .# .    
..#.##  ## # # ...  .. # .    .    
 .....# ..##..   .  .........#     
.......##..## #  ## .#.. .# .##    
............# ##..#  #. # .        
.. ......... ####....#  ..#.  ..   
............##§#  .#. .....## #.#  
........ ...#§§#....#.... .## .    
...........###.##...# #....        
...........##..###.#.. . ...       
.. #......#........#   ..          
   #......#.#...#.#.##. . #_# #. . 
 ..........####.4...#### #       ..
 . .....G.....#..#....#            
...........#.#.......##            
...........##....#..#..            
 ..............#.#......           
 ..........#.#..#......#.          
  ## .....#.#.#.#...#.#.           
   #......#.## ##.# #∩#            
    .. .. ..     ##                
      .  .                         
          .