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

Difficulty: Hard (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)