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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)