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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)