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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)