I need a drop down list which when displayed will provided:
1. a list of 6 items
2. each of the 6 items should be a drop down
3. each of the drop downs from the 6 items should also have drop downs.

I need this to display in one cell.
Example
1
2
3
4
5
6-a
b
c
d
e
f-1
2
3
4
5
6
I have looked at and attempted the information found on the contextures site
about data validation, however I am apparently to dumb to understand it. Can
someone please help?

Thanks