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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)