6			5			9
				8	10			2
6	7			3		1
9							7		3
		9	10				1		8
5		2				10	6
7		3							1
			4		7			5	10
	9			2	8
		6			1			3

Difficulty: Hard (0)

			8			3	7	6
			4				10		1
					1		3	10
	3				5	9		4
		1		2			6		4
4		10			3		5
	2		9	10				5
	7	5		1
6		8				2
	9	3	1			5

Difficulty: Very easy (0)

	10
9	5	3				1	2
6	4			1	5			10	9
2		10						6
			2		1		4	5
	3	1		4		8
	1						5		7
3	7			9	6			4	8
		9	7				10	1	3
								8

Difficulty: Very easy (0)

	9		3	4	1
			5
		6		8				2	1
	10		2	7				3	5
		7	9			6
			10			8	9
3	6				2	1		10
10	2				3		4
						9
				9	4	5		1

Difficulty: Very easy (0)