There are two blocks, A and B. Block A is to the right of B. Block A has one medium black square. Block B contains two medium blue squares. There is also one medium yellow square in this block. It is below medium blue square number one. This block also contains a medium black square. The medium black square is below medium blue square number one which is below medium blue square number two. It is below medium blue square number two and the medium yellow square.
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