title: Match string of odd length
body: <p>Im trying to construct a regular expression to just match if the length of the string is odd. I have not had any success so far.</p>
  
  <p>2313432  - true</p>
  
  <p>12 - false</p>
  
  <p>121111111111111 - true</p>
  
  <p>Thanks</p>