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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)