{HEAD ~ The hollow, vinyl plastic ribs} are inflated with air through {TAIL ~ an air valve} located in the foundation rib 
are inflated through
{ HEAD ~ The hollow , vinyl plastic ribs } are inflated with air through { TAIL ~ an air valve } located in the foundation rib
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH