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

Difficulty: Super easy (0)

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

Difficulty: Very hard (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very hard (0)