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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)