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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Medium (0)

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

Difficulty: Easy (0)