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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)