There are three blocks, A, B and C. Block B is to the left of C and block A is below B. Block A has a small yellow circle and one small black square. A small blue circle is touching the bottom edge of this block. The small black square is touching the right edge of this block. The small blue circle is to the right of the small yellow circle. It is below and to the left of the small black square. Block B has a big blue triangle and one big black square. There is also one small black triangle touching the bottom edge of this block. A big black circle is touching the right edge of this block. Above and near to the small black triangle there is the big blue triangle. To the right of the big blue triangle and the big black square there is the big black circle. Block C has one medium blue circle.
What is to the left of the medium thing? a small black triangle or a big black square?
small black triangle  big black square  both of them none of them