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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)