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

Difficulty: Very easy

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

Difficulty: Easy

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

Difficulty: Medium

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

Difficulty: Hard