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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Super easy (0)