A lottery sales station has been selling an anonymous, unreported scratch-and-read lottery ticket in the past six months  The lottery ticket has 2 hidden two-digit numbers on the left and 6 hidden two-digit numbers on the right  Customers can scratch the lottery ticket after purchase  If a certain number scratched on the right is the same as a certain number on the left, the smaller number _____ scratched under the right number is the winning amount  According to the information provided by the Welfare Lottery Center: The possible winning amounts for this kind of lottery are: 60 yuan, 800 yuan, 6000 yuan, 8000 yuan, 60,000 yuan, 100,000 yuan, and each lottery ticket has at most one winning number  Zhang San bought a lottery ticket at a Welfare Lottery sales station after get off work  After scratching it off, he found that the number on the right was 15, which was the same as the number scratched out on the left  Looking at the number in the small font below it was 8,000 yuan  He was extremely happy  Li Si, who sells lottery tickets, immediately gave him 8,000 yuan, and Zhang San happily went to the restaurant to have a big meal with his friends
Zhang San thinks he really won the lottery
 After the conflict broke out, the two started a lawsuit