.... ... ..# ..# ##.## #......... ∆... ##.........# #.# #........... ∆ #.# ........... #.# #.......... #.# #....$..... #.# ∆ #.......... #.# #..g....... ∆ #'#### #...g.....# ######.#8.# #.........##..........# ############8..8..8...# +.........<# #8..8..8...# #..........# #######.#8.# ######