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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)