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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very hard (0)