{HEAD ~ Information} identifying {TAIL ~ a connection} is hashed to a hash value using the hash function 
identifying
{ HEAD ~ Information } identifying { TAIL ~ a connection } is hashed to a hash value using the hash function
HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH