fun reformat(
  str : String,
  normalizeCase : Boolean = true,
  uppercaseFirstLetter : Boolean = true,
  divideByCamelHumps : Boolean = true,
  wordSeparator : String = " "
) =
  #(normalizeCase, uppercaseFirstLetter, divideByCamelHumps, wordSeparator)

trait A {
    fun bar2(arg: Int = 239) : Int

    fun bar(arg: Int = 240) : Int = bar2(arg/2)
}

open abstract class B() : A, java.lang.Object() {
    fun foo(arg: Int = 239 + 1) : Int = arg

    abstract fun foo2(arg: Int = 239) : Int

    override fun bar2(arg: Int) : Int = arg
}

class C() : B() {
    override fun foo2(arg: Int) : Int = arg

    fun Any.toMyPrefixedString(prefix: String = "", suffix: String="") : String = prefix + " " + suffix

    fun testReceiver() : String {
        val res : String = "mama".toMyPrefixedString("111", "222")
        System.out?.println(res)
        return res
    }

    override fun toString() : String = "CCC"
}

fun <T> T.toPrefixedString(prefix: String = "", suffix: String="") = prefix + (this as java.lang.Object).toString() + suffix

fun box() : String {
    val expected = #(true, true, true, " ")

    if("mama".toPrefixedString(suffix="321", prefix="papa") != "papamama321") return "fail"
    if("mama".toPrefixedString(prefix="papa") != "papamama") return "fail"
    if("mama".toPrefixedString("papa", "239") != "papamama239") return "fail"
    if("mama".toPrefixedString("papa") != "papamama") return "fail"
    if("mama".toPrefixedString() != "mama") return "fail"
    if(C().testReceiver() != "111 222") return "fail"
    if(C().bar(10) != 5) return "fail"
    if(C().bar() != 120) return "fail"
    if(C().foo(10) != 10) return "fail"
    if(C().foo() != 240) return "fail"
    if(C().foo2() != 239) return "fail"
    if(C().foo2(10) != 10) return "fail"
    if(C().bar2() != 239) return "fail"
    if(C().bar2(10) != 10) return "fail"
    if(reformat("", true, true, true, " ") != expected) return "fail"
    if(reformat("", true, true, true) != expected) return "fail"
    if(reformat("", true, true) != expected) return "fail"
    if(reformat("", true) != expected) return "fail"
    if(reformat("") != expected) return "fail"
    return "OK"
}