Hi guys. I'm trying every conceivable angle I can think of in vba and coming up empty. What I have is a spreadsheet similar to this:

Column A Column B

1. 1234567
2. 2345678
3. 3456789
4. 4567890 A0001
5.
6. 9876543
7. 9876543
8. 9876543
9. 1234578
10. 3456789 A0002

What I would like to do is to fill in B1:B3 with A0001 and B6:B9 with A0002. The number of rows in each set of data will vary, but the identifier (A000X) will always be located in the row in column B adjacent to the last entry for that set of data in column A and there will always be empty cells between data sets. The number of data sets will also vary.

Any help would be greatly appreciated. Thanks