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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)