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

Difficulty: Very easy

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

Difficulty: Hard

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

Difficulty: Hard

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

Difficulty: Easy