package test

public class Input(val s1: String, val s2: String) {
    public fun iterator() : Iterator<String> {
        return arrayListOf(s1, s2).iterator()
    }
}

public inline fun <T, R> T.use(block: ()-> R) : R {
    return block()
}

public inline fun <T, R> T.use2(block: ()-> R) : R {
    return block()
}

public inline fun Input.forEachLine(block: () -> Unit): Unit {
    use { use2 (block) }
}