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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Very easy (0)