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

Difficulty: Harder (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very hard (0)