Combining two list

Lists-Logic
1

Hi,
i have a list of revit family (some are the same) and i want to have this result :
1
1
2
2
3
3
3
3
etc…!
Capture.PNG|624x418
Anyone have the solution?
Thanks

2

image
image990×729 51 KB

3 Likes
3

@romain1993

image
image971×861 42.4 KB

2 Likes
4

Thanks, think it’s the good one !!