A priority vector for {HEAD ~ the combination} of {TAIL ~ requesters} has a sequential list of requester identifiers 
of
A priority vector for { HEAD ~ the combination } of { TAIL ~ requesters } has a sequential list of requester identifiers
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH