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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)