1			6
2				4
	6				5
		5			6

Difficulty: Super easy (0)

2		4		1
				6
	1
	3		6		1

Difficulty: Very easy (0)

		1		2
1			2
		5			3
	6		3

Difficulty: Very easy (0)

2		3
	5
	3
				6
				3
			5		1

Difficulty: Very easy (0)