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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)