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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)