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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Super easy (0)