{HEAD ~ Matrix N} is {TAIL ~ a 32 by 64 matrix} which contains only 31 different positive values A to Z and AA to AE as shown in Appendix A 
is
{ HEAD ~ Matrix N } is { TAIL ~ a 32 by 64 matrix } which contains only 31 different positive values A to Z and AA to AE as shown in Appendix A
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH