There is {HEAD ~ an increasing requirement} in todays designs to match length, {TAIL ~ time}, resistance and capacitance across nets on a per layer basis 
There is { HEAD ~ an increasing requirement } in todays designs to match length , { TAIL ~ time } , resistance and capacitance across nets on a per layer basis
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH