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

Difficulty: Super easy (0)

	5
2	4		5
		3
			1
		4		6	1
				5

Difficulty: Super easy (0)

		1
	5				1
	2				4
5				3
4				6
			2

Difficulty: Very easy (0)

6			3		4
				6
1
					2
	6
2		4			1

Difficulty: Super easy (0)