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