There exists one block called AAA. This block have a medium black square and a medium blue square. The black shape are to the north of the medium blue square and another medium blue square.Block AAA covers a medium yellow square which is south of medium blue square number one. Medium blue square number two is in block AAA. Medium blue square number one is to the north of this shape. Medium blue square number two is to the north of the thing which was south of medium blue square number one. The yellow thing touches this shape.
Is any medium black square within a block?