{TAIL ~ each} of gate electrodes of said {HEAD ~ second P channel MOS transistor} and said first N channel MOS transistor receives said input signal 
{ TAIL ~ each } of gate electrodes of said { HEAD ~ second P channel MOS transistor } and said first N channel MOS transistor receives said input signal
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH