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

Difficulty: Harder (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)