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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)