. . . .. .. .. # . . . . . # # # . # .... # # #..# # . # . . . #...# . . #.# .#.[.# ..####.# #. ..# #..#..#..#... # .##. .. ##.##.##...... ## . #. #.... #.# . .. ## .#### .. ....# . . # #. #.#..... #.##.. . ..#. .#... .....#. . .# ....##...#.(..#... # . .# ..#.#...# .. ..##. . .. . .#.#. .##.#....# #.##..###...... .##∩..#. . ...##.....#..#...... ### . #....#..###.. .##...# .# #..#......#..... .# #.#.4..#. ..#.. # # #.p....#..##..#.# #....##.#..#.## ##### .... ##..#... .## ∆ ### #.# ## # ∆