. # .# ... ## #.# .. .. .# #.##.##..# ###.#..#.. ....#..# #..##### #. . ####...*..#∆ 1 #. #......#..# #... #. #..##....#..#. .# . . #....##.#..#. ...#. §≈#..##...#.#..#...#.# ≈≈≈≈.#..##.$#.# ....##.# ≈≈≈#≈..#. .###.#... # . ≈≈≈.#≈# # ..# .#. # .. ≈≈≈≈§≈ ####..#.# ## . ##..####.#.. .###..#.. ≈..... . ....# ..# # # ≈## # ..#. .#..# . . # ## .#.#.....#. . # .##.#.#.... # .. # #...### . .### ..## ## . .#.. #..## ...# . . . .. . #.#.###.. # . ... ## # . . ##... .# . .# . .# .# . # # . .. . . # . . . # # . .. # . ## . #