{HEAD ~ A first address compare circuit} compares {TAIL ~ a received address} for the first memory with the first redundant address 
compares
{ HEAD ~ A first address compare circuit } compares { TAIL ~ a received address } for the first memory with the first redundant address
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH