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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)