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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)