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