title: Show a list of words repeated in haskell
body: <p>I need to be able to write a function that shows repeated words from a string and return a list of strings in order of its occurrence and ignore non-letters</p>
  
  <p>e.g at hugs prompt</p>
  
  <pre><code>repetitions :: String -&gt; [String]
  
  repetitions &gt; "My bag is is action packed packed."
  output&gt; ["is","packed"]
  repetitions &gt; "My name  name name is Sean ."
  output&gt; ["name","name"]
  repetitions &gt; "Ade is into into technical drawing drawing ."
  output&gt; ["into","drawing"]
  </code></pre>