A block named AAA covers a medium black square and has a medium yellow square. South of the medium yellow square there is the medium black square. A block named BBB exists in the image. Block BBB contain a medium blue square and a medium yellow square. A medium black square touches and another medium blue square is to the south of the medium yellow square. The medium black square is inside block BBB. This block covers medium blue square number two. To the south of and touches the medium black square there is medium blue square number two. A block named CCC exists.
Is a medium square within a block?