Thus, if necessary, {HEAD ~ any additional code} will be loaded and run immediately following {TAIL ~ the boot sequence} 
run immediately following
Thus , if necessary , { HEAD ~ any additional code } will be loaded and run immediately following { TAIL ~ the boot sequence }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL