There are two blocks, A and B. Block A is below B. Block A contains one medium yellow square. Block B contains two medium yellow squares and two other medium black squares. Medium yellow square number one is below medium black square number one and medium yellow square number two. Below medium black square number two is medium yellow square number two. Below medium black square number two and medium yellow square number two is medium black square number one.
Which object is above 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