12					8	11	13			4		1
	10							4		2		9	12
			4			2			3			11	6
14		6	3	8			12			1				9
					4	10					14		13	7
			13	9	2				6		12	8
4					9		1			6		15	14	5
2	6						5						1	4
11	1	5		3			15		14					2
		14	7		5				15	8	4
1	15		12					8	2
13				4			14			3	15	5		10
	2	11			7			3			1
	13	7		15		14							8
		3		12			9	10	13					14

Difficulty: Very easy (0)

		5							12	13	1	11		15
			15	11			5	3						4
	1				7			15		2			8	12
		12			13				3			14
11		1	13					14	9	15	5		4	3
9						4			11	8
5		4	9		15	11		6		3	10
		11	12			3	1	10			2	7
			7	13		12		2	4		11	6		1
				14	8			11						9
13	9		8	12	10	1					4	3		11
		3			14				5			13
1	13			6		15			10				11
12						5	8			1	3
15		14	3	9	6							2

Difficulty: Very easy (0)

10		12	8		2	1							9
15			11			3	10	5				13
5		1	2		15				9				3	8
14	8		12		11	13			5	3		10
		9				10	14	2		8	4	7
4					3			8			1		6
			9	2	12
	11			4	10				2	9			12
									6	13	5
	12		5			7			1					15
		2	1	7		5	4	10				12
		15		13	8			12	11		3		1	5
1	6				4				14		8	5		3
		3				12	8	1			13			6
	9							3	13		14	15		7

Difficulty: Easy (0)

8	11	3		6		13			9				1
12				9		8	11	5					13
		4							15	12		9	8	10
				7		3
			5	2	11		14	8					4	13
	1			14			4	15	6	3	5	11		12
							3	13			4	7
		11	8	13	12	14		4	7	9	2	6
		9	3			1	6
1		13	11	3	14	15	7			2			9
15	9					10	5		12	13	1
								1		4
14	6	12		11	15							10
	8					12	10	2		11				3
	3				6			11		8		4	2	7

Difficulty: Easy (0)