,###,,,,##                                          #,##,#,##,
,#,##,,,##                                          ,,##,,,###
,,,###,,##                                          ,,###,,#,#
#,,#,##,##                                          #,#,##,,,,
,#,,,##,##                                          ,,,,###,,,
,,#,,##,##                   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!        ,,###,,#,#
##,,,#,##,                                          ,,#,##,,,#
,##,,,,###                                          #,,,###,,#
,###,,,#,#                                          ##,,#,##,,
,#,##,,,,#                                          ,##,,,###,
,,,###,,,#                                          ,###,,#,##
#,,#,##,,,                                          ,#,##,,,##