Merge the difference from multiple lists

I need to merge all three lists on the left to look like the list on the right.
I bet it could be simple but it broke my brain!
Any thoughts would be greatly appreciated!
Canvas at 13;17;13|690x300 merge_difference.gh (10.3 KB) .

Merge.gh (15.5 KB)

cool thanks. There is no way I would have looked at it like that. -jeff