3			5
	5
			6
		3
				6
	6			2

Difficulty: Super easy (0)

		5
6			5
		4			3
			4

Difficulty: Very easy (0)

				4	3
				1
	6
3					4
			5

Difficulty: Super easy (0)

1
	4
				2	3
			1

Difficulty: Very hard (0)