We have three blocks. We call them A, B and C. Block A has two medium black squares. Medium black square number one is below medium black square number two. To the left of block A is block B which contains two medium blue squares. There is also one medium yellow square in this block. Below medium blue square number two and the medium yellow square there is medium blue square number one. Medium blue square number two is below the medium yellow square. To the right of block B there is block C. It contains one medium black 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