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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Hard (0)