class C(x: Int, val y : Int) {
  fun initChild(var x: Int) : java.lang.Object {
    return object : java.lang.Object() {
      override fun toString(): String? {
          x = x + y
          return "child" + x
      }
    }
  }

  val child = initChild(x)
}

fun box(): String {
  val c = C(10,3)
  return if (c.child.toString() == "child13" && c.child.toString() == "child16" && c.child.toString() == "child19") "OK" else "fail"
}