Write a program to simulate a train route. A train route consists of a number of stations, starting and ending with a terminal station. The time that the train needs to travel between a pair of consecutive stations on the route is given. Associated with each station is a queue of passengers. Passengers are generated at random times, assigned to entry stations randomly, and given random destination stations. Trains leave a terminal at regular intervals and visit the stations on the route. When a train stops at a station, all passengers for that station exit first. Then any passengers waiting in the queue at the station board the train until either the queue is empty or the train is full.