The border can also use {HEAD ~ additional features} to enhance {TAIL ~ the determination} of rotation and skew 
to enhance
The border can also use { HEAD ~ additional features } to enhance { TAIL ~ the determination } of rotation and skew
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH