{HEAD ~ These sidewings} may include {TAIL ~ outrigger hulls} for added stability and improved aerodynamic efficiencies 
include
{ HEAD ~ These sidewings } may include { TAIL ~ outrigger hulls } for added stability and improved aerodynamic efficiencies
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH