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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Easy (0)