Three blocks, called AAA, BBB and CCC exist. A medium yellow square is inside and touching block AAA. Block AAA contains a medium blue square which is south of a medium black square. Block AAA contains the medium black square. The medium black square touches the medium blue square. South of and touches the shape which was to the south of the medium black square there is the medium yellow square. In block BBB is block AAA. Block BBB has a medium blue square. Another medium blue square is inside and touching this block. A medium black square is covered by block CCC.
What is the position of the medium black square in AAA regarding the medium yellow square?