....#.####                                          ####.#.#..
...##..###                                          .###.#.#..
..#.#.#.##                                          #.##.#.#..
.##.#.#..#                                          #..#.#.#..
#.#.#.#.##                                          #.##.#.#..
#.#.#.#..#                  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!        #..#.#.#.#
#.#.#.#.##                                          #.##.#.#..
#.#.#.#..#                                          #..#.#.#.#
#.#.#.#.##                                          #.##.#.#..
#.#.#.#..#                                          #..#.#.#.#
#.#.#.#.##                                          #.##.#.#..
#.#.#.#..#                                          #..#.#.#.#