RegEx and URI Routing

[eluser]ShoeLace1291[/eluser]
Ok, so I'm trying to use regular expressions with the URI routing. My url's containing strings that were generated by the url title function of the url helper. So in other words if the word Xbox 360 is entered it's converted to Xbox-360. What I need is a regex pattern that will match all upper and lowercase letters as well as hyphens.