We have two blocks, A and B. Block A is to the left of B. Block A has two medium black squares. Medium black square number one is below a medium blue square. The medium blue square is below medium black square number two. Below medium black square number two is medium black square number one. Block B has a medium black square. There is also one medium yellow square in this block. Below the medium yellow square there is the medium black square.
Which object is to the left of a medium black square? the medium yellow square or the medium blue square?
the medium yellow square  the medium blue square  both of them none of them