{TAIL ~ The recesses} 16′ have at least one wall 20′ extending from {HEAD ~ the associated base} 12′ 
{ TAIL ~ The recesses } 16′ have at least one wall 20′ extending from { HEAD ~ the associated base } 12′
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH