There are two blocks. We call them A and B. Block A has a big black square and one big yellow square. A medium black triangle is also touching the bottom edge of this block. It is below the big yellow square. The big black square is to the right of the medium object which is below the big yellow square. It is below the big yellow square. To the left of block A is block B with a small blue triangle, a medium blue square and one medium blue triangle in it. It also contains a medium yellow square. The medium yellow square is to the right of the small blue triangle which is to the right of the medium blue triangle. The medium blue square is to the left of and below the medium blue triangle. The medium blue triangle is touching the top edge of this block. The small blue triangle is above the square which is to the left of the medium blue triangle.
What is to the left of the medium black triangle? a medium blue square or a big black square?
medium blue square  big black square  both of them none of them