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);
        for(int i = 0; ; i++) {
            int sum = 0;
            String x = sc.next();
            if(x.equals ("0")) break;
            for(int j = 0; j < x.length(); j++) {
                sum += x.charAt(j) - '0';
            }
            System.out.println(sum);
        }
    }
}
