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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)