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