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

Difficulty: Hard (0)

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

Difficulty: Hard (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)