Property accessors

What will be the output of the following snippet?

fun main() {
    val movieOne = Movie("Anna Gotter")
    movieOne.length = -24
    val movieTwo = Movie("Sky Wars")
    movieTwo.length = 15
    print(movieTwo.length - movieOne.length)
}

class Movie(val name: String) {
    var length: Int = 0
        set(value) {
            field = if (value < 0) value else -value
        }
}