1
4		1
				5	2
6	2
			5		6
		6

Difficulty: Very easy (0)

		2			6
	2			4
	6			5
1			4

Difficulty: Very easy (0)

				1
				2
6			5
		3			2
	4
	3

Difficulty: Very easy (0)

			1	5	2
			3
		4
1	2	6

Difficulty: Very easy (0)