There are three blocks, named AAA, BBB and CCC. Covered by block BBB there is block AAA. Block CCC is above and disconnected from this block. Block AAA covers a medium black square. A medium blue square and a medium black square are within block BBB. Block BBB covers another medium black square and contains a medium yellow square. Medium black square number one is over medium black square number two and touches the medium yellow square. Block CCC covers a medium black square and has another medium black square. A medium blue square and a medium yellow square are in this block. Below medium black square number two is the medium yellow square.
Are all medium black squares disconnected from CCC?