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 s = new Scanner(System.in);
		while (s.hasNext()) {
			char[] chars = s.next().toCharArray();
			if (chars[0] == '0') return;
			int sum = 0;
			for (int i = 0; i < chars.length; ++i) {
				sum += Character.getNumericValue(chars[i]);
			}
			System.out.println(sum);
		}
	}
}