1				3
	2		3
			1	4
	3	1
		2		6
	4				1

Difficulty: Super easy (0)

	4		3
3		5	1
2
					5
		4	2		3
		1		4

Difficulty: Super easy (0)

		3
3	2
				5	1
			6

Difficulty: Very hard (0)

		1			6
				5
				1
	6
	4
2			5

Difficulty: Very easy (0)