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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Hard (0)