title: Matching words using regex
body: <p>I'm very new on learning regex. I've been trying to understand how can I control quantifiers to match a single word out of a string. I know there are vast resources out there but it's hard to find any specific term I'm after.</p>
  
  <p>What I would like to know is how to match the word <code>He</code> from the below string? It would be better if I could know how to match <code>it</code> as well (i meant, matching any positional word):</p>
  
  <pre><code>He found it difficult.
  
  [a-zA-Z].*?    --it's a silly try to match "He"
  </code></pre>