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

Difficulty: Hard

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

Difficulty: Very Hard

1		4		3				3
			1			2
2		6			1			2
			1			5		5
3		7			1
			1			3		5
		3			1
1				2		2		3

Difficulty: Easy

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

Difficulty: Medium