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.util.Scanner;

public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        int sum = 0;
        while(!(n.equals("0"))){
            for(int i=0;i<n.length();i++){
                sum += Character.getNumericValue(n.charAt(i));
            }
            System.out.println(sum);
            n = sc.next();
            sum = 0;
        }
    }
}
