There are two blocks. We call them A and B. Block A contains two medium yellow squares. Below medium yellow square number two there is medium yellow square number one. Block B is to the left of block A. It contains two medium black squares. A medium blue square is touching the bottom edge of this block. Below medium black square number two is medium black square number one. The medium blue square is below medium black square number one and medium black square number two.
Which object is to the left of a medium yellow square? medium black square number one or medium black square number two?
medium black square  number one medium black square  number two both of them none of them