Draw Polyline / Organize branches

Hi guys,
I think this is an easy fix, but I can’t come to a solution…
I have this list and I need to draw polylines of the first point of each column (all of the {?;0} drawing one line, all of the {?;1} drawing another, and so on…). Could someone help me splitting the list so that I can have in one branch all of the first points, and so on with each branch (like the image)? Thank you!

20220707.gh (8.5 KB)

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