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

Difficulty: Medium (0)

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

Difficulty: Very hard (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)