*-----------*
|...|.8.|319|
|.32|.97|8..|
|..8|.56|2..|
|---+---+---|
|2..|..5|.3.|
|..7|...|5..|
|.5.|6..|..7|
|---+---+---|
|..5|91.|7..|
|..3|72.|65.|
|781|.6.|...|
*-----------*