How to mimic default url structure?

 This is the url path we need to mimmic: https://empirearbitration.com/practices-for-sale/medical-practices/760-cosmetic-surgery-practice-for-sale-denver-colorado

I set up this pattern: {categoryPath}/{articleId}-{articleAlias}

But it converts the URLs to https://empirearbitration.com/-

So it appears that the dash - is the problem.

How do I mimic the default SEF url pattern?

Thank you for the reply.

I have cleaned up the site and now the pattern works as desired.