{HEAD ~ This invention} relates generally to digital circuitry and, in particular, to methods of designing and constructing {TAIL ~ digital circuitry} 
{ HEAD ~ This invention } relates generally to digital circuitry and , in particular , to methods of designing and constructing { TAIL ~ digital circuitry }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL