Rewrite URL rules

Hello,

I am quite unfamiliar to rewrite rules.

What I am trying to do is:

I have created a custom plugin to add “text or phrase” either in the beginning and end of the post title using the the_title filter.

I have created options page for plugin.

Now, I want to modify the Posts’ URL to include the “text or phrase” entered in the Plugin settings.

Please ask, if I lack to explain here.

–e.g–
Settings in Plugin
Before title text: One
After title text: two

Now the Post title will be:
One Post Title Two

This much have been achieved.

Now I want the URL to be:
http://www.example.com/one-post-url-two

Does that make sense?

Any help is heartily appreciated.

Thanks,
Ankit