mathmath 0 Newbie Poster

Hi, All
I encounter this problem when I am trying to insert some data manually for my project.
Example:
LA-R1, LA-R2 , LA-R5 , LA-R8 ….. [The Rs are Already in the Original Data]

Simply put, my Goal is to fill in the gaps between the Rs. So, the result will be like :
P = Parent, C=Child
PL CL
LA-R1 LA-2
LA-RI LA-R2

LA-R2 LA-3
LA-R2 LA-4
LA-R2 LA-5
LA-R2 LA-R5

LA-R5 LA-6
LA-R5 LA-7
LA-R5 LA-8
LA-R5 LA-R8

LA-R8………….

I hope I explain well enough this time.
I know I can declare a counter to update the data. However to insert new rows of data, im not sure how I can do that. Please Help.

Thanks very much.