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

Difficulty: Very hard (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)