$ perl drill.pl



Can't locate dog.pm in @INC (you may need to install the dog module) (@INC contains: . /usr/lib/perl5/site_perl /usr/share/perl5/site_perl 
/usr/lib/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib/perl5/core_perl /usr/share/perl5/core_perl) at drill.pl line 4.
BEGIN failed--compilation aborted at drill.pl line 4.