8	11		16	13	5				12	9	3
				8	6					15			7
14			12	9			3							16	2
					2									1
	6							12	9	3	14
				6		7				2					15
11				4		5							2
	16		8	1								14			6
5			1								10	7		4
		14							5		6				16
15					8				16		1
				5	1	14	7							8
	11									5
7	4							9			2	12			5
		6			14					8	13
		16	3	15				6	10	4		8	13

Difficulty: Very easy (0)

	2						6		13	8	3		9
		1						5				7
		12									16
4		16	5										12	6
10				7		2	11		12
								11	5	6		10			4
13	12	5				15			3	7				8
	14	4			8	10				2			7		6
2		7			15				16	3			1	9
	1				14	9			2				8	15	13
5			8		2	6	3
						8		15	11		4				7
	11	6										15	10		16
				8									3
			13				15						6
		9		11	13	12		16						1

Difficulty: Very easy (0)

3	5						8								16
				11			3				12			14
				6	14		1	15					5
4		9					13							12
		2			15	3			16		7
						5	16				13	6		15
	13	11							4				12	8
			7	8					6					3	5
10	6					8					5	16
	4	16				13							6	2
	8		2	12				4	1
				5		11			2	6			14
	14							7					8		6
		6					11	1		3	14
	2			14				16			8
11								2						7	12

Difficulty: Easy (0)

	9			1	16	12						4		11	8
												5
					8		4	12		2	5		15
	4	14		7	13		3				8		12		1
						16		9			3				13
	5			14		4			7						16
							12					6		5	2
	8	4			9						2
				16						4			14	1
1	3		4					8
14						8			2		6			4
6				4			13		16
13		2		10				7		6	4		1	14
		16		13	4		11	10		5
			3
9	6		10						15	11	16			2

Difficulty: Hard (0)