.... . .. . . . . . . . ## .# # ## ## . . .#. .###. .# # . # # .## .. .. . .## . . .# #. ..#. # .. .#.# ... .# ##.. .)...# ..#.. #.#.#.... # #.# .. ## ..# ..#.# . ∆ . ##.#..#..... . .. . # . .#. ..##.#.# ### ∆...#..#..#.#.#. ..####....#.. #.# .. ≈. ###.#.#..## .#......# #.#.......#.#####..#.. #..#...#.#..#........ ## #..........#.##.## #. .# #..##X.#.#..#.. .#..# # #.###.##.. ###...# .# ### #....#..... ...... #.##......# ## .#.. ∆ . ####..### .. .. #. .#. # . .#...#.. #.# ##. ####... # .# .# . .#### . 3 .. #. #