entering {HEAD ~ a time constant value} corresponding to {TAIL ~ the time} constant Tp into the memory of the computing machine 
corresponding to
entering { HEAD ~ a time constant value } corresponding to { TAIL ~ the time } constant Tp into the memory of the computing machine
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH