There are two blocks, A and B. One big black triangle and one medium yellow square are in block A. Below the medium yellow square there is the big black triangle. Block B is below block A. It has a big yellow triangle, one medium blue triangle and one big black circle. The big yellow triangle is to the left of the medium blue triangle. The medium blue triangle is to the right of the big black circle. The big yellow triangle is below the big black circle.
What is to the left of the blue thing? a medium square or a big black triangle?
medium square  big black triangle  both of them none of them