title: Find starting and ending indices of sublist in list
body: <p>I have a list:</p>
  
  <pre><code>greeting = ['hello','my','name','is','bob','how','are','you']
  </code></pre>
  
  <p>I want to define a function that will find the first and last index of a sublist in this list. Thus:</p>
  
  <pre><code>find_sub_list(['my','name','is'], greeting)
  </code></pre>
  
  <p>should return:</p>
  
  <pre><code>1, 3
  </code></pre>
  
  <p>Suggestions?</p>