{HEAD ~ The control unit} can further identify {TAIL ~ those programs} that are not capable of being restored to their original condition and accordingly canceling any program execution when such a condition is judged 
identify
{ HEAD ~ The control unit } can further identify { TAIL ~ those programs } that are not capable of being restored to their original condition and accordingly canceling any program execution when such a condition is judged
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH