$$      
     $$$     
     #.#     
     #.#     
    ##.##    
#####...#####
#.....∩.....#
##..Z......##
#...........#
##...M.....##
#...........#
##.........##
#...........#
##.........##
 ...........#
##.........##
#...........#
##.........##
#...........#
##.........##
#...........#
 ####...#####
    #...#    
   ##...##   
  ##.....##  
  #...∩...#  
  #.......#  
  #...∩...#  
  ##.....##  
   ##...##   
    #####