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