There are two blocks, A and B. Block A is below B. Block A contains two medium black squares. A medium blue square is also in this block. Below the medium blue square is medium black square number two. Medium black square number one is below the medium blue square and medium black square number two. Block B contains one medium black square and a medium yellow square. The medium black square is below the medium yellow square.
What is below the blue thing? a medium yellow square or a medium black square?
medium yellow square  medium black square  both of them none of them