title: Find the uncommon word between two lists?
body: <p>I have 2 lists such as this:</p>
  
  <pre><code>&gt;&gt;&gt;first = ['hello', 'hey', 'hi', 'hey']
  &gt;&gt;&gt;second = ['hey', 'hi', 'hello']
  </code></pre>
  
  <p>I want a new list that contains the word that is not included in the second list. In this case:</p>
  
  <pre><code>odd_word = ['hey']
  </code></pre>
  
  <p>What is the quickest way of doing this? Thank you.</p>
  
  <p>I tried using the method shown here: <a href="https://stackoverflow.com/questions/3462143/get-difference-between-two-lists">Get difference between two lists</a>, but it gives me a blank list.</p>
  
  <pre><code>&gt;&gt;&gt; odd = list(set(first) - set(second))
  &gt;&gt;&gt; odd
  []
  </code></pre>