As shown, {TAIL ~ a common first doped region} is provided for {HEAD ~ the first and second transistors} 
As shown , { TAIL ~ a common first doped region } is provided for { HEAD ~ the first and second transistors }
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD