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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very hard (0)

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

Difficulty: Very hard (0)