{HEAD ~ A receiving space} is formed among {TAIL ~ the two pairs} of the stabilizing wings and the holding portions 
is formed among
{ HEAD ~ A receiving space } is formed among { TAIL ~ the two pairs } of the stabilizing wings and the holding portions
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH