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 {

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

}