/**
   * Created by qwerty on 09.08.14.
   */

  class document(var data: List[Char])
  {
  def this()
  {
    this(List())
  }
    def insertSym(pos: Int, sym: Char)
    {
      data = data.slice(0, pos) ::: sym  :: data.slice(pos, data.length)
    }
    def print()
    {
      println(data.foldLeft("")((str, chr) => str + chr))
    }
    def deleteSym(pos: Int)
    {
      data = data.slice(0, pos) ::: data.slice(pos+1, data.length)
    }
  }

  object HelloWorld extends App {
      var doc = new document()
    doc.insertSym(0,'a')
    doc.insertSym(0,'b')
    doc.insertSym(2,'c')
    doc.print()
    doc.deleteSym(1)
    doc.print()
  }