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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)