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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)