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