There are three blocks. We call them A, B and C. Block A is to the left of B and block C is to the right of A. Block A has two medium yellow squares. Medium yellow square number one is below medium yellow square number two. Block B contains two medium black squares. Below medium black square number two is medium black square number one. And block C contains one medium blue square.
Which object is to the left of a medium black square? medium yellow square number one or medium yellow square number two?
medium yellow square  number one medium yellow square  number two both of them none of them