CHECKER	4	4
[0,0,1,0,-1,1]	[1,0,0,1,2,1]	[2,0,1,0,3,1]	
[0,1,1,1,-1,2]	[1,1,0,2,2,2]	[2,1,1,1,3,2]	[3,1,4,1,2,1]	
[0,2,0,4,1,3]	[2,2,1,3,2,4]	[3,2,4,2,2,2]	
[1,3,0,4,2,4]	
