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

Difficulty: Easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)