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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Hard (0)