##. #. #.. #.. ... ... ##.. ..# #.#.## #.# ..... #.. #..#u# ####.#.## # ###..#....# . #.. #.##..##.# . ##.#.#..#..# . # #..#....### . ..#...#..#..# .##..####.#.## ∆ .#...#..##...# ..###.#.....#. ...# . #.... .. #.##. .#...#.# . #.... #.....#. # #.. #..# ## .. .#