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.*;
import java.lang.*;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);

		while (true) {
			String s = sc.next();
			
			if(s.equals("0")) break;
			
			int sum = 0;
			for(int i = 0; i<s.length(); i++){
				sum+=Character.getNumericValue(s.charAt(i));
			}
			System.out.println(sum);
		}
	}
}
