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Discarding the remaining input using parser combinators
val input = """
0)
blah1
blah2
blah3
1)
blah4
blah5
END
blah6
"""

object Pars extends RegexParsers {
  def strings: Parser[List[String]] = rep(str) <~ end
  def str:     Parser[String]       = ".*".r
  def end:     Parser[String]       = "END" <~ rep(".*".r)
}

Pars.parseAll(Pars.strings, input)

rep(".*".r)

object Pars extends RegexParsers {
  def strings: Parser[List[String]] =
    ( "END" ^^^ Nil
    | ".+".r ~ strings ^^ { case head ~ tail => head :: tail }
    )
}

object Pars extends RegexParsers {
  def strings: Parser[List[String]] = rep(str) <~ "END"
  def str:     Parser[String]       = """.*r?n""".r ^? {
    case s if !(s matches """ENDr?n""") => s.replaceAll("""[rn]""", "")
  }
}

Pars.parse(Pars.strings, input) // note parse, not parseAll
  //[9.4] parsed: List(0), blah1, blah2, blah3, 1), blah4, blah5)