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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)