The fins 14 extend parallel and upwardly from {TAIL ~ the top surface} 16 of {HEAD ~ the base} 12 
The fins 14 extend parallel and upwardly from { TAIL ~ the top surface } 16 of { HEAD ~ the base } 12
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH