There are two blocks. We call them A and B. Block A is below B. Block A has two medium black squares and two other medium yellow squares. Medium black square number one is touching the bottom edge of this block. Below medium yellow square number one which is below medium yellow square number two is medium black square number two. Below medium yellow square number one , medium black square number two and medium yellow square number two there is medium black square number one. Block B has a medium black square.
Which object is below a medium black square? medium yellow square number two or medium yellow square number one?
medium yellow square  number two medium yellow square  number one both of them none of them