means for comparing the first message with {HEAD ~ the set} of {TAIL ~ rules} that are stored in association with the first cache for a match with one or more, and 
of
means for comparing the first message with { HEAD ~ the set } of { TAIL ~ rules } that are stored in association with the first cache for a match with one or more , and
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH