,,~/*$@¶@@                                          @@¶@$*/~,,
,,~/*$¶@##                                          ##@¶$*/~,,
,,~/$@¶@##                                          ##@¶@$/~,,
,,~/*$$$@@                                          @@$$$*/~,,
,,,,,,,/*@                                          @*/,,,,,,,
,,,,,~***@                  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 @@**/~~~,,
,,~/*$@¶¶¶ for something to happen,  far away. this ¶¶¶@$*/~,,
,,~/*$@¶@# is signaled  by  red  or  green  lights. #@¶@$*/~,,
,,~/*****@                                          @*****/~,,
,,~/*$@¶@@                 @@@@@@@@                 @@¶@$*/~,,
,,,,,~*$$¶                                          ¶$$*~,,,,,
,,~/**$$@@ many  people follow  the rails  by foot. @@$$**/~,,
,,,,,/$@@¶ often  this  proves  to  be the  shorter ¶@@$/,,,,,
,,~/*$@¶¶¶ path  between two points.  however  this ¶¶¶@$*/~,,
,,~/*$@@¶@ is  frowned  upon,  and   very  impolite @¶@@$*/~,,
,,,,~/*$@@         toward the train drivers!        @@$*/~,,,,
,,~/*$@¶@#                                          #@¶@$*/~,,
,,,,,/*@¶¶                                          ¶¶@*/,,,,,
,,,,~~*@@@                                          @@@*~~,,,,
,,~/*$@¶@#                                          #@¶@$*/~,,
,,~/*$@¶@@                                          @@¶@$*/~,,
,,~*$@¶@##                                          ##@¶@$*~,,