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