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