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

Difficulty: Very 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)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)