There exist two blocks, called AAA and BBB. North of block AAA is block BBB. Block AAA is away from this block. This block covers a yellow square. A medium black square and a medium blue square are inside block BBB. South of the black shape there is the medium blue square. Another medium blue square is covered by block BBB. The black object touches medium blue square number one. To the south of and touches the shape which was to the south of the black thing is medium blue square number two.
Where is the yellow square relative to medium blue square number one?