<golf>

• 3 trailing-semi-colons rear their ugly heads! (#90)
• $r= in the push ??? (#87)
• abs can go in favour of if($_-$l>1) (#84)

</golf>

but all this is in vain as the code is flawed -- in your example 12 has its own range (12~12) and it's the same for any single integer that doesn't fall in a range.

"Argument is futile - you will be ignorralated!"