1
4			6
		2			4
3

Difficulty: Easy (0)

		2
2			5		1
					3
1
4		5			2
			2

Difficulty: Very easy (0)

	2	5
4
					6
			3	2

Difficulty: Very hard (0)

					4
		5		3
				6
	1
	2		5
3

Difficulty: Very easy (0)