{HEAD ~ A plurality} of {TAIL ~ flexible hinges} couple the plurality of substrates into a substantially flat two dimensional foldable assembly 
of
{ HEAD ~ A plurality } of { TAIL ~ flexible hinges } couple the plurality of substrates into a substantially flat two dimensional foldable assembly
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH