....~††^^#                                          #^^††~....
.,~†^£####                                          ####£^†~,.
....,~^###                                          ###^~,....
.,~†^£####                                          ####£^†~,.
.,~†^£####                                          ####£^†~,.
.....~†^£#                   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!        ####£^†~,.
.,~†^£####                                          ####£^†~,.
.,~†^£££##                                          ##£££^†~,.
....~†^£##                                          ##£^†~....
....,~^###                                          ###^~,....
.,~†^£####                                          ####£^†~,.
.......~^#                                          #^~.......