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

Difficulty: Very easy (0)

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

Difficulty: Harder (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)