public class Cars {
  
    public void accelerate() {
        System.out.println("car is accelerating");
    }
    public void headlightsOn() {
        System.out.println("car's headlights are on");
    }
    public void headlightsOff() {
        System.out.println("car's headlights are off");
    }
    public int return0dometer(int odometerValue) {
        return 10000;
    }
}