{HEAD ~ A jewelry string} is looped around {TAIL ~ the pins} and clamped in position by the clamps 
is looped around
{ HEAD ~ A jewelry string } is looped around { TAIL ~ the pins } and clamped in position by the clamps
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH