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

Difficulty: Hard (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Harder (0)