as Jethro have said, $count was not made to check such kind of thing, since it will work, but its not properly for that...
in my first post i showed the simple way of including a lot of other raws using $istok

if ($istok(312 318,$numeric,32)) {

using MakiMaki method you can use it for a range of raws like

if ($numeric isnum 312-318) { halt }

just a simple example