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

Difficulty: Easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)