3	4
			2
3		1
			1		2
		2
4	2

Difficulty: Super easy (0)

5		3		6
		2		4
	1		2
	3		4		5

Difficulty: Super easy (0)

			3		5
				2
					3
4
	6
5		2

Difficulty: Super easy (0)

					6
					4
5
3

Difficulty: Very easy (0)