There are two blocks. We call them A and B. Block A is to the left of B. Block A has three medium black squares. Below medium black square number two which is below medium black square number three there is medium black square number one. It is below medium black square number three. Block B contains a medium blue square and one medium yellow square. The medium blue square is below the medium yellow square.
Which object is to the left of a blue shape? medium black square number one or medium black square number three?
medium black square  number one medium black square  number three both of them none of them