6			5
			4	1
			2	5
	3	2
	2	4
		5			6

Difficulty: Very easy (0)

			4		1
		6
	1			2
	3			4
			6
4		2

Difficulty: Super easy (0)

	2			4	1
					3
1
4	5			6

Difficulty: Very easy (0)

	1				4
6
			5
		2
					6
1				5

Difficulty: Easy (0)