{HEAD ~ the survivability characteristics} of the modified network has deteriorated in {TAIL ~ comparison} to the survivability characteristics of the current network topology; and 
{ HEAD ~ the survivability characteristics } of the modified network has deteriorated in { TAIL ~ comparison } to the survivability characteristics of the current network topology ; and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH