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

Difficulty: Easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)