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