The VRO then calculates {HEAD ~ optimized control commands} for various network devices including the controllable taps of {TAIL ~ voltage regulating transformers} 
The VRO then calculates { HEAD ~ optimized control commands } for various network devices including the controllable taps of { TAIL ~ voltage regulating transformers }
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL