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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)