KöMaL 2022 K735

Logic blocks were developed by Zoltán Dienes. Peter takes all the red and green disks and squares out of a set of blocks, altogether 16 pieces. No two pieces are identical, and they can be classified into two groups having the same number of elements according to each of the following properties: - either small or large, - either red or green, - either a disk or a square, - either hollow or not. Can Peter place the 16 blocks along the perimeter of a circle such that any two neighbors have exactly one of the above properties in common?