*-----------*
|3..|6..|2..|
|...|..9|76.|
|..4|.78|..9|
|---+---+---|
|9.8|7.2|..3|
|...|...|...|
|7..|4.3|6.1|
|---+---+---|
|5..|92.|8..|
|.27|1..|...|
|..6|..5|..7|
*-----------*