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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)