3		5	4
		2
			6
		6	3		1

Difficulty: Very easy (0)

3	2
			1
		4
			2
		3
				3	5

Difficulty: Super easy (0)

	1
6				4
					5
3
	2				3
				2

Difficulty: Very easy (0)

2
		1
	2		1
		4		6
			3
					1

Difficulty: Super easy (0)