..<.                 
                       ....                 
  ..                  ....a                 
  #..                 ....h                 
.##.s####+########## ......                 
 .........##.......##......                 
  .........h...............                 
  .........#............#                   
   #.##...##............#                   
   #.##...##.......##....#                  
   #......##.......# ....#                  
   #.......#.............#                  
   #.......#........$....#                  
   #.....<.#.............+                  
   #...##÷####...####...##                  
   #...##.########   ####                   
  .....#.....#                              
 +.....#.....#                              
 #.....#.....#                              
#......#.....#                              
#.#######...##                              
        #####                               
                                            
                                           ∩