3	1
	4			3
	1			2
			4	5

Difficulty: Very easy (0)

3			2
6					3
2					1
		5			4

Difficulty: Super easy (0)

4				3
			1
	3
				2
		2
	6				1

Difficulty: Very hard (0)

			5	3
			4
4
					2
		1
	6	3

Difficulty: Very easy (0)