title: how to merge two dimensional list with the same len
body: <p>I have three list that are two dimensional and all three list have the same length.  I would like to merge all three list together and put them in order from small to large. Here's a example below</p>
  
  <p>Here's my three list</p>
  
  <pre><code>a = [[2,4,6],[3,5,7],[6,8,10]]
  
  b = [[5],[4],[9]]
  
  c = [[32,40],[10,19],[5,43]]
  </code></pre>
  
  <p>I have tried using this code below. This code does work but I would like to put it in order</p>
  
  <pre><code>d = [x + y +z for x, y,z in zip(a,b,c)]
  </code></pre>
  
  <p>I would like my result to be something like this</p>
  
  <pre><code>d = [[2,4,5,6,32,40],[3,4,5,7,10,19],[5,6,8,9,10,43]]
  </code></pre>