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       -x
       -x directory
...
            with #! and contains the string "perl".  Any meaningful sw
+itches on that line will be applied.  If a directory name is specifie
+d, Perl will switch to that directory before running
            the program.  The -x switch controls only the disposal of 
+leading garbage.  The program must be terminated with "__END__" if th
+ere is trailing garbage to be ignored (the program
            can process any or all of the trailing garbage via the DAT
+A filehandle if desired).

cducdsgcsdcyvdsctydwcfvsc
rubbish
...

__END__
more garbage here ignored.

darren@barney:~/perlmonks$ perl -x garbage.pl
Hello World