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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)