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

Difficulty: Hard

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

Difficulty: Medium

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

Difficulty: Easy

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

Difficulty: Very easy