We have three blocks, A, B and C. There is one medium black square in block A. Below block A is block B. It contains two medium yellow squares. Medium yellow square number one is touching the bottom edge of this block. It is below medium yellow square number two and a medium black square. Below medium yellow square number two there is the medium black square. Above block B there is block C with one medium blue square in it.
What is above the thing that is touching the bottom edge of a block? a blue thing or a medium yellow square?
blue thing medium yellow square  both of them none of them