We have three blocks. Lets call them A, B and C. Blocks B and C are to the left of A. Block A contains a big blue circle. Block B has a medium black square and one medium black triangle. To the left of the medium black triangle there is the medium black square. And block C has one small yellow triangle, a big black square and one medium black circle. The small yellow triangle is above the medium black circle and the big black square. The big black square is touching the left edge of this block. This block also has a big yellow square. The small yellow triangle is to the left of the big yellow square.. To the left of the big yellow square is the big black square. It is below the medium black circle.
What is to the left of the blue thing? a medium black square or a big yellow square?
medium black square  big yellow square  both of them none of them