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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)