Similar solution to BP1262, except there overlaps do not have to be unique.
Similar solution to BP1261, except there overlaps do not have to be unique.
All left-sorted examples have 2^n distinct white regions, where n is the number of shapes in the image.
Exactly one connected white region for each possible way shapes can overlap vs. not so.
Exactly one connected white region for each possible overlap of shapes vs. not so.
https://en.wikipedia.org/wiki/Venn_diagram
Leo Crabbe