title: Python find all two letter pairs in a word string
body: <p>Let's say I've got a list of words: </p>
  
  <pre><code>word_list = ['WELCOME', 'TO', 'MY', 'B', 'DAY']
  </code></pre>
  
  <p>So...</p>
  
  <pre><code>for x in word_list:
      #Do something
  </code></pre>
  
  <p>How do I make it so that the outcome is a list of all of the possible two letter combinations in each word?</p>
  
  <ol>
  <li>WELCOME: WE, EL, LC, CO, OM, ME</li>
  <li>TO: TO</li>
  <li>MY: MY</li>
  <li>B:</li>
  <li><p>DAY: DA, AY</p>
  
  <pre><code>list = ['WE', 'EL', 'LC', 'CO', 'OM', 'ME', 'TO', 'MY', 'DA', 'AY']
  </code></pre></li>
  </ol>