###           .#    
       ..#          .  #  
        #.#        .##.#  
        #..####   #...#   
        #.#.#v####...     
         #...#.......#.#  
        #..#.v..v.......  
        #.#.#.##..#.....  
       ∩...#.##.###  v..  
      ....... ##.#     .  
     ..#.##.##...##       
     . ## ###..#..####   .
            #.####v..   . 
#     #     ##  #.#. .#.. 
     #.  ##  ####.  ...#  
# #   .##.. ##..#.# .###  
 # .###..####.#.##.....#  
   ...# .#.  # #.....##.  
   ._#. .##.#.  # ####    
 #.  ##.... . ##..        
  ..#..#.#..##    .       
  .  ##...###      #      
 #    #. . #              
      ###..#              
        # #