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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)