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

Difficulty: Very easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)