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