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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)

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

Difficulty: Very easy (0)