{HEAD ~ The memory devices} of {TAIL ~ the present invention} can be designed so that the memory device circulates data either through or past fixed portals 
of
{ HEAD ~ The memory devices } of { TAIL ~ the present invention } can be designed so that the memory device circulates data either through or past fixed portals
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH