import kotlin.platform.platformStatic

object A {

    val b: String = "OK"

    @platformStatic var c: String = "Fail"

    @platformStatic fun test1() : String {
        return b
    }

    @platformStatic fun test2() : String {
        return test1()
    }

    fun test3(): String {
        return "1".test5()
    }

    @platformStatic fun test4(): String {
        return "1".test5()
    }

    @platformStatic fun String.test5() : String {
        return this + b
    }
}

fun box(): String {
    if ((A::test1)(A) != "OK") return "fail 1"

    if ((A::test2)(A) != "OK") return "fail 2"

    if ((A::test3)(A) != "1OK") return "fail 3"

    if ((A::test4)(A) != "1OK") return "fail 4"

    (A::c).set(A, "OK")

    if (((A::c).get(A)) != "OK") return "fail 5"

    return "OK"
}