Text parsing

Hey guys suppose I have an application that is fed the body of my post. Now my post might contain quotations such as
>>8
>>3-7
>>2,3,4
>>7-8,2,5,10-12
It also may have quotations mid-text such as >>42.

Now, I want the result of my application to be
2 3 4 5 6 7 8 10 11 12
.
Notice 42 is missing because it was midtext.

How would you code that? (Before you laugh and say it's trivial - it is, but I want to code it).

I figured, maybe I will use perl. But maybe not. Since it's been a lot of time since I coded, I want to use something that is funky to code it. Perhaps factor, or J. Well, that's my shitty thread, thanks for reading.

It doesn't handle cases like >>-5 or >>5- since I don't feel like adding that, but here's some perl.

perl -lne 'if (/^>>([\d,-]+)/) { $m = $1; $m =~ s/-/../g; push @r, eval($m) } END { print join " ", sort { $a <=> $b } grep { ! $u{$_}++ } @r }'

Guess I can't leave code unfinished... here's a revised version.

perl -lne 'if (/^>>([\d,-]+)/) { foreach (split /,/, $1) { s/^-/1-/; s/-$/-1000/; s/-/../g; push @r, eval($_) } } END { print join " ", sort { $a <=> $b } grep { ! $u{$_}++ } @r }'