http url parameters question

Hi yall, I am currently trying to make a Deno http server for the funs, but I am walking into a problem.

I want to have 3 pages: //, /thing/thing and /thing/:id/thing/:id.
If the route is //, it directs to home, if the route is /thing/:id/thing/:id, then it directs to that page, and if the route is /thing/:id/thing/:id but without a (valid) id, then it directs to /thing/thing. Is there a way to do this without putting the handlers for /thing/thing and /thing/:id/thing/:id in seperate?