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