$/ = ".*\n.*\n.*\n"

##</code><code>##

-- file --
asdfasdf asdfasdf asdfasdf
asdfasdfasdf asdfasdf
someting adfasdf
asdfasdfasdfasdfasdf
asdfasdfasdf
asdfasdfasdfasdfasdfasdf
werwerwerwer
ertertert
zsdfasdfasdf