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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)