import java.io.*

val ByteArray.inputStream : ByteArrayInputStream
    get() = ByteArrayInputStream(this)

fun InputStream.iterator() : ByteIterator =
    object: ByteIterator() {
        override val hasNext : Boolean
            get() = available() > 0

        override fun nextByte() = read().byt
    }

fun box() : String {
    val x = ByteArray (10)

    for(index in 0..9) {
        x [index] = index.byt
    }

    for(b in x.inputStream) {
       System.out?.println(b)
    }

    return "OK"
}