I have data in cells A2, A3 and A4 as below:
1, 2, 4, 5, 7, 8
1, 2, 3, 4
2, 3, 4

I want to split into columns (which I did using Data Text to Columns
option).

But I also want the data to "automatically" fall under appropriate heading
(1, 2, 3, 4, 5, 6, 7, 8) which are in respecive cells A1:H1.

Thank you in advance