If this ticket is not {HEAD ~ a duplicate} at block 228, a charge for the ticket is made by decreasing the money variable by {TAIL ~ the cost} of the ticket 
If this ticket is not { HEAD ~ a duplicate } at block 228 , a charge for the ticket is made by decreasing the money variable by { TAIL ~ the cost } of the ticket
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH