said combining element combines {HEAD ~ the data input signal} with the output of the feedback element to produce {TAIL ~ an output} which forms the first input to the selector element, 
to produce
said combining element combines { HEAD ~ the data input signal } with the output of the feedback element to produce { TAIL ~ an output } which forms the first input to the selector element ,
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH