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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)