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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very hard (0)

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

Difficulty: Super easy (0)