{TAIL ~ The gamma structures} have a base 12′ and a plurality of {HEAD ~ recesses} 16′ defined therewithin 
{ TAIL ~ The gamma structures } have a base 12′ and a plurality of { HEAD ~ recesses } 16′ defined therewithin
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH