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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)