#!/usr/bin/env ruby
# frozen_string_literal: true

class Main
  def run
    @sum = 0

    line = $stdin.gets.chomp
    line.split(",").each do |range|
      lo, hi = range.split("-")
      (lo..hi).each do |num|
        if num.length.even?
          if num[0..(num.length / 2) - 1] == num[(num.length / 2)..]
            @sum += num.to_i
          end
        end
      end
    end

    puts @sum
  end
end

Main.new.run