The company sent three young staff to the south on a business trip, and they happened to be sitting in a row  At least one of the two people sitting on the right side of the 24-year-old is 20 years old, and the two people sitting on the left side of the 20-year-old also happen to be 20 years old
At least one of the two people sitting on the left side of the accountant is a salesman, and one of the two people sitting on the right side of the salesman happens to be a salesman
A 20-year-old accountant, a 20-year-old salesman, a 24-year-old salesman.