title: Concatenate two list based on the same index
body: <p>I have two lists.</p>
  
  <pre><code>A = [1,5,10]
  B = [72,36,58]
  </code></pre>
  
  <p>I'd like to concatenate two lists based on the same index.</p>
  
  <pre><code>Output = [1,72,5,36,10,58]
  </code></pre>
  
  <p>I know I can use <code>zip(A,B)</code> to do so but in this way I need to remove tuple from the list. </p>
  
  <p>Any hint or elegant way to do this?</p>