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