title: Regex: Extract string between [..]
body: <p>Exmaple: &quot;[A]_AND_[B]_AND_[C]3NOT[C]_AND_NOT__[D]__AND_[E]13[F]_AND_[G]_AND_NOT[G]&quot;</p>
  <p>&gt;&gt; [A,B,C,C,D,E,F,G,G]</p>
  <p>I want to extract every sub-string within [ ]. Couldn't figure out the correct syntax.</p>