There are two blocks. Lets call them A and B. Block A is above B. Block A has one medium yellow square and one medium black square. Below the medium black square is the medium yellow square. Block B contains two medium yellow squares. It also contains one medium blue square. It is below medium yellow square number two. Below the medium blue square and medium yellow square number two there is medium yellow square number one.
What is below the black object? a blue shape or a medium yellow square?
blue shape medium yellow square  both of them none of them