Concurrent programs with many replicated threads, e.g., running {HEAD ~ the same piece} of code, occur in {TAIL ~ many important applications} 
Concurrent programs with many replicated threads , e.g. , running { HEAD ~ the same piece } of code , occur in { TAIL ~ many important applications }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL