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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)