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 in = new Scanner(System.in);
		while (true) {
		    String x = in.next();
		    if (x.equals("0")) {
		    	break;
		    }
		    char[] chars = x.toCharArray();
		    int sum = 0;
		    for (char c : chars) {
			    sum += Character.getNumericValue(c);
		    }
		    System.out.println(sum);
		}
	}
}	
