{HEAD ~ The manager computer} is further coupled to the number of uninterruptible power supply systems via {TAIL ~ the computer network} 
is coupled via
{ HEAD ~ The manager computer } is further coupled to the number of uninterruptible power supply systems via { TAIL ~ the computer network }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH REL OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL