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);
		for(;;) {
			String number = sc.nextLine();
			long sum = 0;

			if(number.equals("0")) break;
			else {
				for(int i=0;i<String.valueOf(number).length();i++) {
					int j = i;
					sum += Integer.parseInt(String.valueOf(number).substring(i,j+1));
				}
			}
			System.out.println(sum);
		}
	}
}

