{TAIL ~ Each hair retainer} has a pair of {HEAD ~ opposing hinge ledges} at one end portion thereof 
{ TAIL ~ Each hair retainer } has a pair of { HEAD ~ opposing hinge ledges } at one end portion thereof
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH