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

Difficulty: Super easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)