There are three blocks. We call them A, B and C. Block B is above and A is below C. Block A has two medium black squares. This block also has one medium yellow square. It is below medium black square number two. Medium black square number one is below medium black square number two and the medium yellow square. Block B has one medium black square. Block C has a medium blue square.
What is above the blue shape? a yellow thing or a medium black square?
yellow thing medium black square  both of them none of them