Arbiter 16 receives requests for access from any of {HEAD ~ a number} of {TAIL ~ requesters} 
of
Arbiter 16 receives requests for access from any of { HEAD ~ a number } of { TAIL ~ requesters }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL