. . # . ## . #### . .# #. .. ..# #. #._###....## ...## .# ...###.# ## ...####...##..# . ...#..######...#∩.# #.....#..2##...#..#... #.................... ................... .....##$.# ..##..##..## #...##.2##..##..## # #................ . #................. #...##..##..##..##. ##.. #..##..##..# .. ........... ............ .##..# ..##. #..# ..# . .