We have three blocks. Lets call them A, B and C. Block A contains a medium yellow square. Then, there is block B with two medium black squares in it. Below medium black square number two and a medium yellow square is medium black square number one. Medium black square number two is below the medium yellow square. To the right of both blocks B and A there is block C. It has a medium blue square and one medium yellow square. The medium blue square is below the medium yellow square.
What is to the left of the blue shape? a medium black square number two or a medium black square number one?
medium black square  number two medium black square  number one both of them none of them