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);
		int num;
		main: while (sc.hasNext()) {
			String str = sc.next();
			int sum = 0;
			for (int i=0; i < str.length(); i++) {
				num = Integer.parseInt(str.substring(i, i+1));
				if (i == 0 && num == 0) break main;
				sum += num;
			}
			System.out.println(sum);
		}
		sc.close();
	}
}