Need help creating simple form

If someone had a moment to help me create a rather simple form for our site, I would be very grateful.

I would like to have a form on a page that is asking the user to input a value. Upon hitting the “submit” button, I’d like for that value to be placed in a URL and the user be taken to that page. For instance – if the user inputs:

this-is-what-the-user-enters

Then upon hitting “submit”, their browser then goes to this page:

http://my-website.com/this-is-what-the-users-enters

I’m sure this is simple, but solutions I have found elsewhere all end up included a “?” in the resulting URL string.