oddsASCII

using System;
using System.Linq;
using System.IO;
using System.Text;
using System.Collections;
using System.Collections.Generic;

/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/
class Solution
{
    static void Main(string[] args)
    {
        string word = Console.ReadLine();

        // Write an action using Console.WriteLine()
        // To debug: Console.Error.WriteLine("Debug messages...");
        
        int count = 0;
        
        byte[] asciiBytes = Encoding.ASCII.GetBytes(word);
        
        for(int i = 0 ; i < word.Length ; i++)
        {
            if(asciiBytes[i]%2==1)
            count += asciiBytes[i];
        }
        
        Console.WriteLine(count);
    }
}