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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)