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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)