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

Difficulty: Medium (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)