CHECKER	18	18
[6,0,3,2,8,3]	[15,1,14,5,18,4]	[3,2,2,7,8,3]	[8,3,7,8,10,6]	[0,4,3,2,2,7]	[14,5,18,4,13,9]	[10,6,14,5,13,9]	[2,7,7,8,4,10]	[7,8,10,6,4,10]	[13,9,11,12,16,11]	[4,10,1,13,5,14]	[16,11,11,12,17,16]	[11,12,9,15,12,17]	[1,13,-1,16,-2,11]	[5,14,1,13,6,18]	[9,15,5,14,6,18]	[17,16,12,17,15,19]	[12,17,9,15,15,19]