There are three blocks, named AAA, BBB and CCC. A medium black square and a medium blue square are within block AAA. Block AAA covers another medium blue square. Medium blue square number two touches medium blue square number one. Block AAA contains block BBB. A medium black square is covered by block BBB. Block BBB has a medium yellow square. The medium black square touches the medium yellow square. A medium yellow square is inside and a medium black square is covered by block CCC. Block CCC contains another medium black square.
Where is the medium black square covered by BBB regarding AAA?