Sudoku Game: ME-23 Medium

1				5	6	7		9
	5	6	7				2	3
7			1	2	3		5	6
	1	4			5	8	9	7
	6	5	8	9	7	2	1	4
8		7	2	1	4			5
5		1				9	7
6	4	2	9			5	3
9	7	8	5				4