@,@,,@@,,,                                          ,@@,,@@,,@
@,@,@,@,,,                                          ,,@,@,@,@,
@,@,@,@,,,                                          ,@@,@,@,@,
@,@,@,@,,,                                          ,,@,@,@,@,
@,@,@,@,,,                                          ,@@,@,@,@,
@,@,@,@,,,                   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!        ,,@,@,@,@,
@,@,@,@,,@                                          ,@@,@,@,@,
@,@,@,@,@@                                          ,,@,@,@,@,
@,@,@,@,,@                                          ,@@,@,@,@,
@,@,@,@,@@                                          ,,@,@,@,@,
@,@,@,@,,@                                          ,@@,@,@,@,
@,@,@,@,@@                                          ,,@,@,@,@,