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

Difficulty: Medium (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)