There are two blocks. We call them A and B. There is one medium black square in block A. To the left of block A there is block B. It contains two medium blue squares. Medium blue square number one is below medium blue square number two and a medium yellow square. It also contains a medium black square. The medium black square is below the medium yellow square , medium blue square number two and medium blue square number one.
Which object is to the left of a medium black square? medium blue square number one or medium blue square number two?
medium blue square  number one medium blue square  number two both of them none of them