{HEAD ~ Data} stored by {TAIL ~ the exchange system} for printing an exchange system coupon can be modified remotely at substantially any time 
{ HEAD ~ Data } stored by { TAIL ~ the exchange system } for printing an exchange system coupon can be modified remotely at substantially any time
HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH