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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Hard (0)