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

Difficulty: Very easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)