title: How to add integers from one list to another in ascending order?
body: <p>Assuming:</p>
  
  <p>x = [1,2,3,4,5]
  y = [11,12,13,14,15]</p>
  
  <p>How do I make it such that: </p>
  
  <p>x+y = z</p>
  
  <p>In that z is: 
  z = [12,14,16,18,20]</p>