Forums Scripts & Popups "Random" question

I know how to pick a random nick from all present in the channel - $nick(#,$r(1,$nick(#,0))) - But I was wondering if there was a way to exclude certain nicks from being chosen. I am trying to exclude 3 nicks from being chosen when I run my command.

var %n
while (1) {
var %n $nick(#,$r(1,$nick(#,0)))
if (!$istok(nick1 nick2 nick3,%n,32)) break
}
return %n

Thank you Wims!

Edit: For some reason the command failed to work until I removed "return %n"