sorting points

Hello. 

I want to divide six curves. So I´ll get six lists of points from zero to ten. Now I would like to get of each list the point with the index number zero to create a interpolate curve. I want to repeat this for the numbers one to ten. 

Later I want to loft the curves to get some kind of pipe.

Now my question. I know of the "list item" component. But this would be to much work, if I have to deal with much bigger lists.

Does anybody have an idea how to sort my lists?

Thanks a lot for reading my question and I would be very happy if anybody have a hint for me.

 best wishes,

Oliver