8	4	7	5						1
		3		1	7	4
		2	6
						8		6
7				3			9
		10			3				9
	2		9
						1	10
			4	8	1		2
9						3	4	1	7

Difficulty: Very easy (0)

									7
	2	8	7	1	3				4
				6			3	9
				4	5				10
6	7	3	2				5
		5				3	9	1	2
8				7	6
	3	2			4
1				2	7	8	4	10
2

Difficulty: Super easy (0)

1				5
2	5					9			3
	6				2	3	8
			5		1		3
		10		7		8
		3	7	9				10
5			8					4	9
					8				7

Difficulty: Easy (0)

				10					1
		8	6	2			5	9
3			8
		4		6		1	8
		3
							4
		7	1		9		2
						4			2
	9	2			8	10	7
10					5

Difficulty: Easy (0)