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);

			while(true) {
			int sum = 0;
			String num = sc.next();
			if(num.equals("0"))	break;

			for(int i = 0; i < num.length(); i++) {
				int n = 0;
				n = Integer.parseInt(num.substring(i, i+1));
				sum += n;
			}
			System.out.println(sum);
		}
		sc.close();
	}
}


