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;

class Main {

	public static void main(String[] args) {

		char[] x;

		Scanner stdIn = new Scanner(System.in);

		boolean flag = true;
		while (flag) {
			int sum = 0;
			x = stdIn.nextLine().toCharArray();
			if(x[0] == '0') {
				break;
			}

			for (int j = 0; j < x.length; j++) {
				sum += Character.getNumericValue(x[j]);
			}
			System.out.println(sum);
		}
		stdIn.close();
	}
}