*-----------*
|19.|82.|...|
|85.|.6.|21.|
|..7|..5|..8|
|---+---+---|
|.8.|6..|..1|
|...|...|...|
|6..|..8|.3.|
|---+---+---|
|2..|4..|7..|
|.79|.3.|.84|
|...|.57|.26|
*-----------*