{HEAD ~ The external spline} is capable of {TAIL ~ axial movement} with respect to the internal spline 
is capable of
{ HEAD ~ The external spline } is capable of { TAIL ~ axial movement } with respect to the internal spline
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH