2
3	4
			4
		3
				3	6
				5

Difficulty: Very hard (0)

					3
	3		6
				5
	5
		1		4
1

Difficulty: Very easy (0)

		2		4
			1
	3				1
5				2
		1
	2		6

Difficulty: Easy (0)

	1	5		3
	6			1
	5			6
	2		5	4

Difficulty: Very easy (0)