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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Hard (0)

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

Difficulty: Hard (0)