In order to reduce traffic congestion, a city has taken measures such as the lower limit: On weekdays from Monday to Friday, non-commercial vehicles are restricted to one day in five groups according to their tail numbers 0, 5, 1, 6, 2, 7, 3, 8, 4 and 9, and not limited to weekends and legal holidays. Those who break the rules will be fined.
Zhang SAN and his neighbor have a total of three private cars, with different tail numbers. They cooperate and have two cars to drive every day may not violate the traffic restrictions.