9
			6		3		4
						7	1
						6	5	9
	7						8
3	5	1
	1	5
	2		7		1
	4

Difficulty: Easy (0)

					5	7
6			3			5	2	9
	4			3			6
						1
				8
		4
	7			2			1
1	6	5			3			4
		3	5

Difficulty: Easy (0)

	4
9				3		1
	5	2		6
			8
5	2	1				3	4	9
					8
				4		2	3
		6		5				4
							5

Difficulty: Easy (0)

9			7					8
				5		7
			8		5		3	9
			9	8
		3				6
				1	3
5	4		3		2
		2		4
8					7			4

Difficulty: Very easy (0)