The computer readable media 22, wherein the representative value comprises {TAIL ~ a representative value} included in {HEAD ~ the received request} 
The computer readable media 22 , wherein the representative value comprises { TAIL ~ a representative value } included in { HEAD ~ the received request }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD