using System;

public class Program

{

    public static void Main(string [] args)

    {

        int sum = 0;

        string readInput = Console.ReadLine();

        string [] splitString = readInput.Split('+');

        foreach(string s in splitString)

                sum = sum + int.Parse(s);

        Console.WriteLine("The sum of the string is: {0}",sum); 

    }

}