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);

		String[] n;
		int sum=0;
		while(true) {
			n = sc.nextLine().split("");
			if(n[0].equals("0")) break;
			sum=0;
			for(int i=0;i<n.length;i++) {
				sum += Integer.parseInt(n[i]);
			}
			System.out.println(sum);
		}

		
		sc.close();

	}

}
