.. . #..#. . . . ... . #. .###.#.# . .. .#.. # .. .. ##### #.# .. ...#.#.......# . #..##.#.. ....# # .#. .##.....# . ..#.... #....### . ##.##.# . ###...##..# # #. .... ##x.#.. ##.... #. .#...x # #...#.. #..## #. .. ..#. #..#..#.# # #. #... .# #.#.##.# . # # .. .#...#.##### ..# # #. . .#.#x...#..# # . ####.X#....# ## #.#.h##.....# #..#### ##.#. ...# . #### ∆ ∆