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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)