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 scan = new Scanner(System.in);
		for(int b = 1;b>0;b++){
			String r = scan.next();
			int tot = 0;
			if(r.equals("0")){
				break;
			}
			for(int a = 1; a<=r.length();a++){
				String k = r.substring(a-1,a);
				int K = Integer.parseInt(k);
				tot = tot + K;
			}
			System.out.println(tot);
		}
	}
}