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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Easy (0)