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

Difficulty: Hard (0)

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

Difficulty: Easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Easy (0)