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.*;
import java.text.*;

class Main {
    public static void main(String[]args)throws Exception {
        Scanner sc = new Scanner(System.in);
        for(;;) {
            char [] cs = sc.nextLine().toCharArray();
            if(cs[0] == '0') break;
            int s = 0;
            for(int i = 0; i < cs.length; i++) {
                s += cs[i] - '0';
            }
            System.out.println(s);
        }
    }
}