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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Very easy (0)