#####     
    ##...##    
   ##.....##   
   #...∩...#   
   #...∩...#   
   ##.....##   
    ##...##    
     #...##    
     ##...#    
     ##...#    
     #444##    
     #...#     
    #.....#    
   .........   
  ...........  
#.............#
...............
...............