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

Difficulty: Hard (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)