There are three blocks. We call them A, B and C. Block A contains two medium black squares. Medium black square number one is touching the bottom edge of this block. Below a medium blue square is medium black square number two. Medium black square number one is below the medium blue square. It is below medium black square number two. Then, we have block B which has one medium blue square. Block C is below block B and to the right of block A. It contains a medium yellow square.
What is to the left of the yellow thing? a medium blue square which is in block B or a medium blue square that is in block A?
medium blue square  which is in block B medium blue square  that is in block A both of them none of them