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