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

Difficulty: Super easy (0)

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

Difficulty: Medium (0)

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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)