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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Hard (0)