// Will be executed on JDK 9, 11, 15
// IGNORE_BACKEND: ANDROID
fun test(z: Int): String {
    val result = "" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" +
            z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" +
            z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" +
            z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" +
            z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" +
            z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" +
            z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1" + z + "1"


    return result
}

fun box(): String {
    val result = test(0)

    if (result.length != 280)
        return "fail 1: ${result.length}"

    return if (result != "0101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101010101") "fail 2: ${result}" else "OK"
}