{HEAD ~ a second gate electrode} of {TAIL ~ a second MOS transistor} of a second conductivity type formed on said primary surface of said substrate 
of
{ HEAD ~ a second gate electrode } of { TAIL ~ a second MOS transistor } of a second conductivity type formed on said primary surface of said substrate
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH