The replacement of the value by {TAIL ~ the new value} modifies the computer program while {HEAD ~ the computer program} is executed by the processor 
The replacement of the value by { TAIL ~ the new value } modifies the computer program while { HEAD ~ the computer program } is executed by the processor
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH