There are three blocks, A, B and C. Block A contains a medium blue square. Below block A there is block B which has a medium black square. To the left of block A there is block C with three medium yellow squares in it. Medium yellow square number one is below medium yellow square number three. Below medium yellow square number three there is medium yellow square number two. Medium yellow square number one is below the medium yellow square number two.
What is to the left of the blue thing? a black object or a medium yellow square?
black object medium yellow square  both of them none of them