title: Convert String 'shorter' to 'short' using Python nltk stem package
body: <p>I am trying to extract the stem of the words <code>taller</code> and <code>shorter</code> from  a string in python.</p>
  
  <p>I did the following:</p>
  
  <pre><code>&gt;&gt;&gt; from nltk.stem.porter import *
  &gt;&gt;&gt; print(stemmer.stem('shorter'))
  shorter
  &gt;&gt;&gt; print(stemmer.stem('taller'))
  taller
  </code></pre>
  
  <p>And for some reason, I don't get the words <code>tall</code> and <code>short</code>. Anyone knows how to possibly fix this, or possibly guide to an alternative solution?</p>