title: posix regex not match a word
body: <p>So for example I'm trying to not match 'test'. I've tried [^t][^e][^s][^t]. It won't match it, but it also won't match if at least one of the characters match the notes in the same position. </p>
  
  <p>Any idea how to get around this?</p>
  
  <p>Just a note, this is POSIX version of regex, there are no look-aheads or look-behinds.</p>
  
  <p>Also, to clarify, the word I want is between certain characters, i.e. for the string "sdkfjdlskj &lt;dsfdjslj@example.com&gt;" I am looking for everything between '&lt;>'. The email part is easy, but not matching a certain word is quite boggling.</p>