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);

		while (sc.hasNext()) {
			String x = sc.next();
			int sum = 0;
			char[] str1 = x.toCharArray();
			for (int i = 0; i < str1.length; i++) {
				sum += Character.getNumericValue(str1[i]);
			}

			if (x.equals("0")) {
				break;
			}
			System.out.println(sum);
		}

	}

}