{HEAD ~ Thus, any occurrence} of a combination of sequences that causes large interference may reduce {TAIL ~ the communications quality} 
reduce
{ HEAD ~ Thus , any occurrence } of a combination of sequences that causes large interference may reduce { TAIL ~ the communications quality }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL