FIG 5 is of course {TAIL ~ just one possible example} of {HEAD ~ a lookup} in which the invention may be implemented 
FIG 5 is of course { TAIL ~ just one possible example } of { HEAD ~ a lookup } in which the invention may be implemented
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH