...... #....# +....# ∆ #....# #....# #....# ###+##....# #...5..# #...55.# #...@Y.# #......+ #......# #......##+## ####........# #..#........+ #..#..<.....# #..'........# ########........# ............####.. ............# . ............# ............# ............+ ∆ ............# ########....# ....#