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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)