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