class Car {
    let horsepower: Int
    let color: String
    let numberOfCarDoors: Int

    init(horsepower: Int, color: String, numberOfCarDoors: Int) {
        self.horsepower = horsepower
        self.color = color
        self .numberOfCarDoors = numberOfCarDoors
    }
}

let myCar = Car(horsepower: 120, color: "green", numberOfCarDoors: 4)