This one is kind of complicated.

I have 2 columns with numbers in them.(they are much bigger than my
examples). All numbers in column B exist in column A but not all numbers in
column A exist in column B. What I need to do is match up B with A. So I need
to find the number 2 in column A and then move the 2 down in column B so it
aligns with the 2 in column A. Is there a quick and easy way to do this? I
have listed my desired result below.

A B

1 2
2 4
3 5
4 8
5
6
7
8


Desired result

A B

1
2 2
3
4 4
5 5
6
7
8 8



ngg