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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)