Methods and apparatus for defining {HEAD ~ Manhattan power grid structures} having {TAIL ~ a reduced number} of vias 
having
Methods and apparatus for defining { HEAD ~ Manhattan power grid structures } having { TAIL ~ a reduced number } of vias
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH