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.

Example

Input

123
55
1000
0


Output

6
10
1
import java.io.*;
import java.util.Scanner;
public class Main{
    public static void main(String args[]){
      Scanner sc=new Scanner(System.in);
       while(true){
        String  x=sc.next();
        if(x.equals("0"))break;
        int  sum=0;
        for(int i=0;i<x.length();i++){
               sum+=Character.getNumericValue(x.charAt(i));
           }
        System.out.println(sum);
      }
    }
}
