class Yukicoder
  def initialize
    s = gets.chomp
    list = s.chars
    max_val = 0

    0.upto(s.size-1) do |n|
      begin
        a = list.rotate(n).join

        if a =~ /^\d.*\d$/
          val = eval(a)
          max_val = [max_val, val].max
        end
      rescue => ex
      end
    end

    puts max_val
  end
end

Yukicoder.new