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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Hard (0)