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

Difficulty: Very easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Hard (0)

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

Difficulty: Easy (0)