class Lister(size: Int) {
  private val list: List[Int] = createList(size)

  private def createList(size: Int): List[Int] = {
    if (size < 1) {
      Nil
    } else if (size % 2 != 0) {
      (size :: createList(size - 1)).reverse
    } else {
      size :: (createList(size - 1).reverse)
    }
  }

  override def toString: String = {
    toString(list)
  }

  private def toString(list: List[Int]): String = {
    list match {
      case Nil => {
        ""
      }
      case first :: Nil => {
        first.toString
      }
      case first :: remained => {
        first + "-" + toString(remained)
      }
    }
  }
}

object App {
  def main(args: Array[String]) {
    for (arg <- args) {
      for (size <- 1 to arg.toInt) {
        println(new Lister(size))
      }
    }
  }
}