Using regex to match string between two strings while excluding strings

Question

Following on from a previous question in which I asked:

How can I use a regular expression to match text that is between two strings, where those two

Answer 1

You can replace .*? with

 ([^u]|u[^n]|un[^w]|unw[^a]|unwa[^n]|unwan[^t]|unwant[^e]|unwante[^d])*?

This is a solution in "pure" regex; the language you are using might allow you to use some more elegant construct.