{HEAD ~ a second switching element} and a third switching element coupled in {TAIL ~ series} between the output of the first pre buffer and the given terminal and 
coupled in
{ HEAD ~ a second switching element } and a third switching element coupled in { TAIL ~ series } between the output of the first pre buffer and the given terminal and
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH