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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)