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

Difficulty: Very easy (0)

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

Difficulty: Super easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)