There are three blocks. Lets call them A, B and C. Block A is to the left of block B and it is below block C. Block A has a medium blue square. Block B has two medium black squares. This block also contains one medium blue square. Below medium black square number one and a medium yellow square is the medium blue square. Below medium black square number two and medium black square number one there is the medium yellow square. Below medium black square number two there is medium black square number one. Block C contains one medium blue square.
Which object is to the left of a medium 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