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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)