Each of {HEAD ~ the capacitors} is formed of a series circuit of {TAIL ~ two substantially equal size individual capacitors} forming a capacitor pair 
Each of { HEAD ~ the capacitors } is formed of a series circuit of { TAIL ~ two substantially equal size individual capacitors } forming a capacitor pair
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH