3
							4
		9		8
			1		5
				4		2
	7
							9

Difficulty: Very hard (0)

					4
	5
					1
							3	4
		1				9
6	2
			3
							6
			6

Difficulty: Very hard (0)

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

Difficulty: Very hard (0)

	7						9
				6		2
								3
5
		6		9
	6						8

Difficulty: Easy (0)