2		2		2		1		1		1		1		3
1		2		1												1
	1		2		5		5		7		6		4		4
				1												3
2		3			4		6		7		6		7		5
			1									1				3
3		4		4			5		6		5		3		4
	1											2		1
3			1		4		7		6		3		1			2
		1		1											1
	3		5		6		5		7			4		5		5
2													1
	5		8		7		6		6		2			4		4
2												1
	5		7		3		6		7		6		2
1												1		5		3
	2		4		1		1		2		4		2		1

Difficulty: Very Hard

2		2		2		3			3		2			1
	1							1		4			4			2
			1		2				1
2		1		2		3		3		7			7		3
	4		5		3											2
2							2			7			5		4
				1		3			1							2
	3		6		4			3		6			6		6
2																2
	5		5			3		3			3		5		4
2					2		2			4		2
	3		4			5			1							2
3		1									2		6		4
	2		6			8		5		5		3				2
											1
2			3			4		2					3		2
	1				2		2			2		2		2		2

Difficulty: Hard

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

Difficulty: Easy

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

Difficulty: Very easy