The new value is received during {HEAD ~ execution} of the computer program by {TAIL ~ a processor unit} 
by
The new value is received during { HEAD ~ execution } of the computer program by { TAIL ~ a processor unit }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL