5
		4
	3				5
6				1
			4
				3

Difficulty: Very easy (0)

				1
2		6
	3	5
			5	6
			2		4
	4

Difficulty: Very easy (0)

			6
	5			2
					3
5
	1			5
		5

Difficulty: Very hard (0)

		6
4	2				3
1				6	4
			4

Difficulty: Easy (0)