Finally, {HEAD ~ circuits} are described which show {TAIL ~ embodiments} of the invention according to the two methods 
show
Finally , { HEAD ~ circuits } are described which show { TAIL ~ embodiments } of the invention according to the two methods
OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH