11		7	2	4		8			9
			6		7	1
8						2	10			11
	11					10		7
3			8		9				12		6
	4				11	3	8	9			10
9			4	1	10	6				8
5		2				9		12			7
			7		12					6
	9			10	1						5
					8	7		10
		4			5		9	3	2		12

Difficulty: Very easy (0)

12	2	1	5		11	6			8	7
8			3	7	5			4
		4	9			8					10
		7	8	12		2	3	10		6
	3		12	5		7				4
1						11
					6						4
	8				7		5	6		11
	9		6	1	2		4	8	10
4					9			7	12
			1			5	7	11			9
	12	6			8	4		2	3	1	5

Difficulty: Super easy (0)

			10						1	3	11
	9		3				6	10		4
		8				1			9	6	12
	5		1	10							9
8	10	4		9		3				7	6
			12			6					4
12					3			11
9	1				12		8		3	5	7
5							11	12		9
10	3	1			5				12
	8		9	3				4		10
4	7	5						9

Difficulty: Easy (0)

					8			3	10	11	6
		4	11	3		10		5	9
10					12				7	1
	7									9
		8		2		3	9		11		5
5		2				4		6		3
	11		4		2				5		9
7		1		12	11		8		4
	2									6
	4	3				9					10
		5	2		3		1	9	6
9	1	7	6			8

Difficulty: Hard (0)