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(;;) {
			
			int ans = 0;
			String s = sc.nextLine();

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

			for(int i=0; i < s.length(); i++) {
				ans += Character.digit(s.charAt(i), 10);
				
			}
			System.out.println(ans);
		}
		

	}

}

