{TAIL ~ The base} 12 has {HEAD ~ a top surface} 16 and a bottom surface 18 opposite thereto 
{ TAIL ~ The base } 12 has { HEAD ~ a top surface } 16 and a bottom surface 18 opposite thereto
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH