#.##..##.#                                          #..#.##.#.
#..#.#.#.#                                          #.##..#.#.
#.##.#.#.#                                          #..#.##.#.
#..#.#.#.#                                          #.##..#.#.
#.##.#.#.#                                          #..#.##.#.
#..#.#.#.#                  rails                   #.##..#.#.
#.##.#.#.#                                          #..#.##.#.
#..#.#.#.#                                          #.##..#.#.
#.##.#.#.# ######################################## #..#.##.#.
#..#.#.#.#                                          #.##..#.#.
#.##.#.#.# ######################################## #..#.##.#.
#..#.#.#.#                                          #.##..#.#.
#.##.#.#.#                                          #..#.##.#.
#..#.#.#.# trains  are  so  constructed  that  they #.##..#.#.
#.##.#.#.# have to follow a set path. this path  is #..#.##.#.
#..#.#.#.# called a "railway", which  is  comprised #.##..#.#.
#.##.#.#.# of two metal  rails, hence its nickname. #..#.##.#.
#..#.#.#.#                                          #.##..#.#.
#.##.#.#.# because  the  low friction  between  the #..#.##.#.
#..#.#.#.# wheels of  the train and the rail metal, #.##..#.#.
#.##.#.#.# there are limits  for how acute a  curve #..#.##.#.
#..#.#.#.# can be, and  even more  so for how  much #.##..#.#.
#.##.#.#.# the   ground  under  the  rails  can  be #..#.##.#.
#..#.#.#.# sloped. thus a railway is  often not led #.##..#.#.
#.##.#.#.# on  top of hills, rather through them in #..#.##.#.
#..#.#.#.# tunnels  (if   they   are   large),   or #.##..#.#.
#.##.#.#.#            artificial chasms.            #..#.##.#.
#..#.#.#.#                                          #.##..#.#.
#.##.#.#.# there will be  trees on the side of  the #..#.##.#.
#..#.#.#.# rails, but not too close,  or  they will #.##..#.#.
#.##.#.#.# be  cut down  by  the  railway janitors. #..#.##.#.
#..#.#.#.# there  will  be plains,  and  bodies  of #.##..#.#.
#.##.#.#.#                  water.                  #..#.##.#.
#..#.#.#.#                                          #.##..#.#.
#.##.#.#.# trains  go  by  day  and by night. along #..#.##.#.
#..#.#.#.#      the way, there is information       #.##..#.#.
#.##.#.#.# scattered,  often  put  on top of poles, #..#.##.#.
#..#.#.#.# to be  interpreted by the train drivers. #.##..#.#.
#.##.#.#.# different  parts  of  the  railway  have #..#.##.#.
#..#.#.#.#         different speed limits.          #.##..#.#.
#.##.#.#.#                                          #..#.##.#.
#..#.#.#.# sometimes, trains have to  stop and wait #.##..#.#.
#.##.#.#.# for something  to happen, far away. this #..#.##.#.
#..#.#.#.# is  signaled by  red  or  green  lights. #.##..#.#.
#.##.#.#.#                                          #..#.##.#.
#..#.#.#.#                 ########                 #.##..#.#.
#.##.#.#.#                                          #..#.##.#.
#..#.#.#.# many people follow  the  rails by  foot. #.##..#.#.
#.##.#.#.# often  this  proves  to be  the  shorter #..#.##.#.
#..#.#.#.# path  between  two  points. however this #.##..#.#.
#.##.#.#.# is  frowned  upon,   and  very  impolite #..#.##.#.
#..#.#.#.#        toward the train drivers!         #.##..#.#.
#.##.#.#.#                                          #..#.##.#.
#..#.#.#.#                                          #.##..#.#.
#.##.#.#.#                                          #..#.##.#.
#..#.#.#.#                                          #.##..#.#.
#.##.#.#.#                                          #..#.##.#.
#..#.#.#.#                                          #.##..#.#.