{HEAD ~ A unique filename} is generated for {TAIL ~ each screened message} and a pair of index node and storage node identifiers are calculated from the unique filename 
is generated for
{ HEAD ~ A unique filename } is generated for { TAIL ~ each screened message } and a pair of index node and storage node identifiers are calculated from the unique filename
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH