title: How to create a list from beginning number and end number
body: <p>I have a set of numbers:</p>
  
  <pre><code> |  A     B
  --------------
  1| 100   102
  2| 103   103
  3| 104   105
  4| 106   110
  </code></pre>
  
  <p>Column A is the beginning number and Column B is the end number. We need to create a list (on a separate cell) of numbers using the beginning number and end number using column A &amp; B. 
  E.g. based on the 1st set of data from Row 1(A1 &amp; B1) the 1st set of numbers will be: 100,101,102, then it will go to row 2, put 103 after 102 and move on to row 3, expanded the list and display 104 and 105, then to last row where it should list 105,106,107,108,109,110.</p>
  
  <p>We should be able to mark the beginning of the number for the list so that we know the start of each list. i.e. all the number listed in Column A should be marked.</p>