5	1
4
			5		1
1		6
					4
				1	6

Difficulty: Super easy (0)

		1
6
		2	3
		3	5
					1
			4

Difficulty: Super easy (0)

				4
			6
1
					1
		2
	5

Difficulty: Easy (0)

4	5
				2
	3
				1	2

Difficulty: Super easy (0)