.. ∆ ... . ..## .. ∆ b. ...# #.# ∆#. #.. .. .#..##.##.# ..........# .........##### ...$.(.).....# #######o....<# #.....)# ###...###### ##.......# #oo.....# #o###...# #.#⌠#...# #.###...# #.....### # ##.#### ..#######..# ...........# #........o.# #......<...# #..........# ############