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

Difficulty: Super easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Very easy (0)

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

Difficulty: Easy (0)