5	6		3		4
6		5		1	2

Difficulty: Very easy (0)

			3		1
1			6
		4			5
6		5

Difficulty: Super easy (0)

4
6			5
3		6
			3		4
		4			1
					5

Difficulty: Super easy (0)

2		4
				2
	1
			6		5

Difficulty: Very hard (0)