There are three blocks. We call them A, B and C. Block A contains one medium black square and one medium blue square. Below the medium blue square there is the medium black square. To the right of block A is block B with a medium yellow square in it. Below block A there is block C. It has four medium black squares. Medium black square number one is touching the bottom edge of this block. Medium black square number two is below medium black square number four. Below medium black square number four is medium black square number three.. Medium black square number one is below medium black square number four. It is below medium black square number three. It is below medium black square number two.
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