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