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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)