....# ....# # ...#.##.....# .#..## ##.# #.. # .#.# .# ....# ..#..#.. ∆ #...#.. ..# .## ..# .3## ####.#.. . ##....#..... ### # #.# ..#..#.## ..# ..# ###...#..# ... . # #......# ... # #.###..##.# #......#.# #.#.....# .###....# ##...# #..3..# ......#...# #.#..#.#####..# ..##.X .! .. #.. # . ###