s = gets.chomp
rl = []
[*1..9].reverse.each do |i|
  [*0..9].reverse.each do |j|
    next if i == j
    rl << Regexp.new("(#{i}).*(#{j}).*#{j}")
  end
end
ans = 0
while true do
  z = false
  rl.each do |i|
    if s =~ i
      z = true
      _s = $&
      _b = $`
      _a = $'
      v1 = $1
      v2 = $2
      ans += v1.to_i * 100 + v2.to_i * 11
      _s.gsub!(v2, "")
      _s.sub!(v1, "")
      s = _b + _s + _a
      break;
    end
  end
  break unless z
end
puts ans