CHECKER	4	4
[0,0,-1,1,0,2]	[2,0,1,1,2,2]	
[1,1,1,3,2,2]	[3,1,3,3,4,2]	
[0,2,0,4,1,3]	[2,2,2,4,3,3]	
[1,3,0,4,1,5]	[3,3,2,4,3,5]