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.*;
class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String x;
		int total;
		while(true){
			x = sc.next();
			if (x.equals("0")){
				break;
			}
			total = 0;
			for (int i = 0; i < x.length(); i++){
				total += Integer.parseInt("" + x.charAt(i));
			}
			System.out.println(total);
		}
	}
}