using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Numerics;
using System.Text;
using static System.Console;
using static System.Convert;
using static System.Math;
using static Extentions;

class IO
{
    int idx;
    string[] input = In.ReadToEnd().Split(new[] { " ", "\n", "\r" },
        StringSplitOptions.RemoveEmptyEntries);

    T Get<T>(Func<string, T> parser) => parser(input[idx++]);

    public string S => Get(s => s);
    public char C => Get(char.Parse);
    public int I => Get(int.Parse);
    public long L => Get(long.Parse);
    public double F => Get(double.Parse);
    public decimal D => Get(decimal.Parse);
    public BigInteger B => Get(BigInteger.Parse);

    T[] Gets<T>(int n, Func<string, T> parser)
        => input.Skip((idx += n) - n).Take(n).Select(parser).ToArray();

    public string[] Ss(int n) => Gets(n, s => s);
    public char[] Cs(int n) => Gets(n, char.Parse);
    public int[] Is(int n) => Gets(n, int.Parse);
    public long[] Ls(int n) => Gets(n, long.Parse);
    public double[] Fs(int n) => Gets(n, double.Parse);
    public decimal[] Ds(int n) => Gets(n, decimal.Parse);
    public BigInteger[] Bs(int n) => Gets(n, BigInteger.Parse);

    public void Write<T>(params T[] xs) => WriteLine(string.Join(" ", xs));
    public void Write(params object[] xs) => WriteLine(string.Join(" ", xs));
}

static class Extentions
{
}

static class Program
{
    public static void Main()
    {
        var sw = new StreamWriter(OpenStandardOutput()) { NewLine = "\n" };
#if DEBUG
        sw.AutoFlush = true;
#else
        sw.AutoFlush = false;
#endif
        SetOut(sw);
        Solve(new IO());
        Out.Flush();
    }

    static bool IsCww(char a, char b, char c) => a != '0' && a != b && b == c;

    static int Search(StringBuilder sb)
    {
        if (sb.Length < 3) return 0;

        var list = new List<char>();
        var max = 0;

        for (var i = 0; i < sb.Length - 2; i++)
        {
            for (var j = i + 1; j < sb.Length - 1; j++)
            {
                for (var k = j + 1; k < sb.Length; k++)
                {
                    if (IsCww(sb[i], sb[j], sb[k]))
                    {
                        var score = (sb[i] - '0') * 100
                                  + (sb[j] - '0') * 10
                                  + (sb[k] - '0');

                        var sbc = new StringBuilder(sb.ToString());
                        sbc.Remove(i, 1);
                        sbc.Remove(j - 1, 1);
                        sbc.Remove(k - 2, 1);

                        max = Max(max, score + Search(sbc));
                    }
                }
            }
        }

        return max;
    }

    static void Solve(IO io)
    {
        var n = io.S;

        io.Write(Search(new StringBuilder(n)));
    }
}