{HEAD ~ a reset element} that is turned on or off by a reset signal and that resets {TAIL ~ the input node} in an on state, 
{ HEAD ~ a reset element } that is turned on or off by a reset signal and that resets { TAIL ~ the input node } in an on state ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH