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