4
8
7
5
3
7
2
3
4
8
6
5
9
3
6
2
9
8
6
5
1
8
6
3
2
9
2
6
8
4
1
3
9
7
3
5
Some hospitals use Sudoku as a cognitive exercise for patients recovering from strokes or brain injuries.
Some hospitals use Sudoku as a cognitive exercise for patients recovering from strokes or brain injuries.
Some hospitals use Sudoku as a cognitive exercise for patients recovering from strokes or brain injuries.
Some hospitals use Sudoku as a cognitive exercise for patients recovering from strokes or brain injuries.