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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Super easy (0)