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

Difficulty: Very easy (0)