title: Compare two list and output missing and extra element (Python)
body: <p>I've 2 lists(sorted) of prefix and would like to compare it in Python so that I can output which element in the original list was missing and which was added.</p>
  
  <p>Eg.</p>
  
  <pre><code>list1_original = ['1.1.1.1/24','2.2.2.2/24','3.3.3.3/24','4.4.4.4/24']
  list2 = ['3.3.3.3/24','4.4.4.4/24','5.5.5.5/24','6.6.6.6/24']
  </code></pre>
  
  <p>I want to compare the 2 lists and output the add/remove element in list1_original. ie:</p>
  
  <pre><code>1.1.1.1/24, 2.2.2.2/24 = missing
  5.5.5.5/24, 6.6.6.6/24 = added
  </code></pre>