In a manner similar to identifying more significant and less significant bits, {TAIL ~ regions} in {HEAD ~ the output mask} may be viewed as more significant or less significant 
In a manner similar to identifying more significant and less significant bits , { TAIL ~ regions } in { HEAD ~ the output mask } may be viewed as more significant or less significant
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH