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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)