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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)