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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Easy (0)