We have three blocks, named AAA, BBB and CCC. Disconnected from block BBB is block AAA. To the south of and east of this block there is block BBB. A medium yellow square is in block AAA. Block AAA covers a medium black square. Block BBB contains a medium blue square. To the south of a medium yellow square there is the medium blue square. The medium yellow square is in block BBB.
What is the position of the medium yellow square in BBB relative to the medium yellow square in AAA?