title: how to match a relative url that exclude specific word between '/'?
body: <p>I try it hardly above three days.</p>
  
  <p>the requirement of pattern will match </p>
  
  <pre><code>/clubb/clubindex
  /cclub/clubindex
  /cllub/clubindex
  /anyword/clubindex
  </code></pre>
  
  <p>but not <code>/club/clubindex</code>, just only exclude <code>/club/clubindex</code>.</p>
  
  <p>I use negative lookahead and try to reslove it.</p>