a distributed digital communication system within {TAIL ~ each} of {HEAD ~ said slave and master subsystems}, each including a supervisor processor, 
a distributed digital communication system within { TAIL ~ each } of { HEAD ~ said slave and master subsystems } , each including a supervisor processor ,
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH