Problem:
Sum of Numbers

Write a program which reads an integer and prints sum of its digits.

Input

The input consists of multiple datasets. For each dataset, an integer x is given in a line. The number of digits in x does not exceed 1000.

The input ends with a line including single zero. Your program should not process for this terminal symbol.

Output

For each dataset, print the sum of digits in x.

Sample Input

123
55
1000
0

Sample Output

6
10
1

Solution in C# (judge verdict: Wrong Answer)

using System;
using System.Linq;

public class Hello
{
    public static void aiueo(string str)
    {
        int sum=0;
        for(int i=0;i<str.Length;i++)sum+=int.Parse(str[i].ToString());
        
        Console.WriteLine(sum);
    }
    
    public static void Main()
    {
        string str="";
        for(;str!="0";){
            str=Console.ReadLine();
            aiueo(str);
        }
        Console.WriteLine();
        
    }
}