Sorting List

Hi guys,

I have a list of 6145 curves, and a list of 6145 closed curved (sections). Originally a perpendicular plan to the curves have been created where sections have been generated in rhino.

Now I assigned these curves and sections to a grasshopper definition, where I need to sort them again in the same order.

Can anyone advise please ?

I tried the curve closest point commend, but it failed.

Thanks