title: Drop duplicate values in each list in a list of lists
body: <p>I have a long list of lists that looks like:</p>
  
  <pre><code>mylist = [['1', 24, 'A', 'A'], ['1', 35, 'A', 'B', 'B'], ['2', 12, 'B', 'C', 'B']]
  </code></pre>
  
  <p>I want drop any duplicate values after the first two positions in each list, so for <code>['1', 24, 'A', 'A']</code>, ignore positions <code>1</code> and <code>24</code>, then consider the rest of positions to see if there are duplicates. For this list, I want output <code>['1', 24, 'A']</code>. The list lengths are variable, anywhere from 3 to 8 items long.</p>
  
  <p>Full desired output is:</p>
  
  <pre><code>output = [['1', 24, 'A'], ['1', 35, 'A', 'B'], ['2', 12, 'B', 'C']]
  </code></pre>
  
  <p>The order within each list is important, but not the overall order of all the lists in the list. </p>