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) {

		Scanner scan = new Scanner(System.in);

		for(;;){
			String str = scan.next();

			if(str.equals("0"))
				break;

			int ans = 0;

			for(int i=0; i<str.length(); i++){
				ans += Character.getNumericValue(str.charAt(i));
			}

			System.out.println(ans);
		}
	}

}