#                      
                            # .                         
                             #                          
                                  .                     
                          . . # .     ..                
                         ...   ##  ....                 
                          # #   .. # .#                 
                           .  . # #   #                 
                       .##. #        #                  
                        . ..#   ## .     #.#            
                         .    . ## #     ..##           
                          #. #  #..##  ...#..#          
                         #        X#..# #...            
                       #    # . .  ..###...             
                            # ##### .h#..#  ∆           
                         .     .  .  h#$.##.#           
                           .  # #.. ##h$....#           
                            # . .. .##$$..##            
                                 . #..#.###             
                             #  #  ######               
                                     ∆                  
                                      ∆