There are two blocks. We call them A and B. Block A is below B. Block A has two medium black squares. Medium black square number one is touching the bottom edge of this block. Medium black square number two is below a medium blue square. Medium black square number one is below the medium blue square and medium black square number two. Block B has one medium yellow square and one medium black square. The medium yellow square is below the medium black square.
What is below the yellow thing? a medium black square that is touching the bottom edge of a block or a medium blue square?
medium black square  that is touching the bottom edge of a block  medium blue square  both of them none of them