Forums Scripts & Popups [Quickie] What's wrong with this regex?

Thanks for your reply Lire.

It is meant to be case sensitive, I did not write Tiger and Lion with capital. Minor detail I didn't see, sorry.

I simply need both of them to be detected if typed alone - whereas now only one of them is (The first one).

I'm not good with regex, I'm quite confused as to what exactly you wrote there in your example! Thanks.