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  1. or download this
    package MyA;

...
sub a { shift->{a} }

__PACKAGE__
  2. or download this
    package MyB;

...
sub b { shift->{b} }

__PACKAGE__
  3. or download this
    package MyC;

...
use parent qw{ MyA MyB };  # Multiple inheritance, MyA takes precedenc
+e

__PACKAGE__
  4. or download this
    #!/usr/bin/perl
use warnings;
...
my $c = 'MyC'->new;
print $c->a;
print $c->b;  # uninitialized value
  5. or download this
    ($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,