1	5				6
	1
				1
4				3	1

Difficulty: Easy (0)

	6	1
	5
4
					1
				3
			4	5

Difficulty: Very easy (0)

	1			2
3			1
2
					3
		1			6
	4			5

Difficulty: Super easy (0)

	6	3
			6	3
					4
1
	4	2
			3	1

Difficulty: Very easy (0)