#!/usr/bin/perl
use strict;
use warnings 'all';
	my	$structure = [ { a => 1, b => 2, c => 3 }, { d => 4, e => 5 }, [ 6, 7, 8 ], 9, 10, 11, [ 12, 13, 14 ] ];
	
	sub addtwo {
		
	my $params = shift;
 	my $s = $params->{$structure};
	
    if (ref($s) eq "ARRAY") {
         my $c = 0;
        foreach my $e (@{$s}) {
            $s->[$c] = addtwo({ structur => $e });
            $c++;
        } 
    } elsif (ref($s) eq "HASH") {

        if (scalar keys %{$s} == 0) {
            return undef;
       } else {
            foreach my $e (values %{$s}) {
                $s->{$e} = addtwo({ structure => $s->{$e} });
            }
        }
    
    } else {
        $s = 1;
    }
    
    return my $c;
}