tree branches creation

Hi guys.

I have a list of weaved points (first image)

I want to make a curve interpolation between those points in groups of 3 (second "brutal image")

I thought that maybe remapping my list in a tree with "n" branches with 3 items each, and than running the interpolation command would have worked.

The problem is how to build this tree. I tryed with the path mapper (image 3), but I don't manage to obtain the structure that I want.

Any help would be appreciated.

Thank you