frobnicate(\%hoh_groups_prod);


##</code><code>##

sub frobnicate {
    my $hash = shift;
    $hash->{key} = ... ;
    # etc.
}


##</code><code>##

($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,