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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)