We have three blocks. We call them A, B and C. Block C is below block A and to the right of block B. Block A contains one medium yellow square. Block B has a medium blue square. And block C has two medium black squares. Medium black square number one is below medium black square number two. Below medium black square number one and medium black square number two there is a medium blue square.
Which object is to the left of a medium blue square? medium black square number two or medium black square number one?
medium black square  number two medium black square  number one both of them none of them