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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)