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

Difficulty: Very hard (0)

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

Difficulty: Very hard (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very hard (0)