We have two blocks. We call them A and B. Block A is to the left of B. Block A has two medium blue squares and two other medium black squares. Medium blue square number one is below medium black square number one , medium black square number two and medium blue square number two. Medium black square number one is below medium black square number two and medium blue square number two. Block B has one medium black square.
Which object is to the left of a medium black square? medium blue square number one or medium blue square number two?
medium blue square  number one medium blue square  number two both of them none of them