object Main extends App {

  val A: Int = io.StdIn.readLine().toInt
  val B: Int = io.StdIn.readLine().toInt

  var sum: Int = 0

  for ( i: Int <- A to B ) {
    var n: String = i.toString
     if ( n(0) == n(4) && n(1) == n(3))
        sum += 1
  }

  print(sum)

}
