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

Difficulty: Very hard (0)

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

Difficulty: Easy (0)

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

Difficulty: Very hard (0)

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

Difficulty: Easy (0)