The disclosure relates to counters that require {HEAD ~ the counting} to be done under {TAIL ~ conditions} of high security 
The disclosure relates to counters that require { HEAD ~ the counting } to be done under { TAIL ~ conditions } of high security
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH