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

Difficulty: Very easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Hard (0)

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

Difficulty: Very easy (0)