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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)