>perl -lw sand_parent.pl
5
6

>perl -v
This is perl, v5.8.8 built for MSWin32-x86-multi-thread
(with 25 registered patches, see perl -V for more detail)

##</code><code>##

$ perl -lw sand_parent.pl
5
6

$ perl -v
This is perl, v5.8.4 built for i386-linux-thread-multi