. . # . . . . . # # # # #.. . . ## .# ... . ..# # #.# # .# ## # # . ... .. ..# . # # ########## ## ... #.H......#. . # .#.######.#. . ...#.#∆ . . #.#.# # # # ..#......#. . .# . ########. # #....... .. .# ##. ##### ## ### ... . .. ... # ## ###. .# ## # . . ...# # ##