{HEAD ~ The multicast session repair system} includes a repair server in the network providing the packets it receives in {TAIL ~ the multicast session} to the recipients 
{ HEAD ~ The multicast session repair system } includes a repair server in the network providing the packets it receives in { TAIL ~ the multicast session } to the recipients
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH