[Zope] How do i write <or>?

Hi there.... I have a small challenge you all.... The thing is that I have this page (made by somebody else) wich is supposed to look up some words in a database by writing: <some url>?letter=a* - this displays all the words starting with a... But how do I look up all the words starting with the letters from a-c? I know that it must be something like this <some url>?letter=a*|b*|c* or maybee <some url>?letter=a*<or>b*<or>c* My question is this how do I write <or> in this line..? Stoons - the newbie - still! = )