1			2			2
	1
2				3		4
	2		3
3		1		5		5
	2		3
3		3		2		1

Difficulty: Easy

	1		4			2
2		2
			4			4
		3		3
3			1
		2		4		2
2			2		1

Difficulty: Medium

2		3		2		2
			2		1
		1
2			4			3
				1
	1		2
1		2		3		2

Difficulty: Hard

	1		2			2
2		5		4
4		6		6		3
			1
		1		4		3
2			3		1

Difficulty: Very easy