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

Difficulty: Very easy (0)

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

Difficulty: Super hard (2599)

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

Difficulty: Very hard (0)

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

Difficulty: Easy (0)