C146

The office manager handed Tsinghua 100 yuan, 500 yuan, 1,000 yuan, 2,000 yuan and 3,000 yuan in coupons and told Tsinghua and Pei to make the lottery draw. Since there were so many lottery draw tickets, Tsinghua transferred Pei over to help.

In the beginning, the two didn't talk too much and thought they would have to make tens of thousands of lottery tickets in two days. It was tiring, too