fun main() {

    val fan = Fan()
    val conditioner = Conditioner()
    val heater = Heater()

    val climatControl = ClimatControl()
    climatControl.coolToOn(fan)
    climatControl.coolToOn(conditioner)
    climatControl.heatToOn(heater)
}

class ClimatControl { // климат контроль
    fun coolToOn(element: Cooling) {
        element.cool()
    }
    fun heatToOn(element: Heating) {
        element.heat()
    }
}

interface Cooling {
    fun cool() //охлаждение
}

interface Heating {
    fun heat() //обогрев
}

class Fan : Cooling {
    override fun cool() {
        println("Fan is on!")
    }
}

class Conditioner : Cooling {
    override fun cool() {
        println("Conditioner is on!")
    }
}

class Heater : Heating {
    override fun heat() {
        println("Heater is on!")
    }
}