The first and second circuit blocks are capable of operating independently of one another, with {HEAD ~ each} performing {TAIL ~ an associated function} 
performing
The first and second circuit blocks are capable of operating independently of one another , with { HEAD ~ each } performing { TAIL ~ an associated function }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL