..,~:$*@##                                          ##@*$:~,..
.,~:$*@###                                          ###@*$:~,.
..,~:$*@##                                          ##@*$:~,..
...,~:$*@#                                          #@*$:~,...
....,~:$*@                                          @*$:~,....
.....,~:$*                  rails                   *$:~,.....
......,~:$                                          $:~,......
.......,~:                                          :~,.......
........,~ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ ~,........
.........,                                          ,.........
........,~ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ ~,........
.......,~:                                          :~,.......
......,~:$                                          $:~,......
.....,~:$* 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!        #@*$:~,...
....,~:$*@                                          @*$:~,....
.....,~:$*                                          *$:~,.....
......,~:$                                          $:~,......
.......,~:                                          :~,.......
........,~                                          ~,........
.........,                                          ,.........