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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)