We have three blocks. We call them A, B and C. One medium blue square is in block A. Block B is to the right of block A. It contains two medium yellow squares. A medium black square is below medium yellow square number one which is below medium yellow square number two. It is below medium yellow square number two. Finally, there is block C which is to the left of block A. It contains one medium yellow square.
What is to the left of the black object? a medium yellow square number one or a medium yellow square number two?
medium yellow square  number one medium yellow square  number two both of them none of them