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.*;

public class Main {
    static public void main(String[] args){
       Scanner sc = new Scanner(System.in);
        while(true){
            String s = sc.next();
            if(s.equals("0")) break;
            int sum = 0;
            for(int i = 0; i<s.length(); i++){
                sum += Integer.parseInt(s.substring(i, i+1));
            }
            System.out.println(sum);
        }
        sc.close();
    }
}
