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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)