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