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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)