There are three blocks. Lets call them A, B and C. Block A has a medium black square. Below block A is block B which contains a medium blue square. Finally, there is block C. It is to the left of block B. It contains two medium black squares. Below a medium yellow square and medium black square number two is medium black square number one. Below the medium yellow square is medium black square number two.
What is to the left of the blue thing? a medium black square number two or a medium black square that is in block A?
medium black square  number two medium black square  that is in block A both of them none of them