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.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class Main {

	public static void main(String args[]) {
		Scanner sc = new Scanner(System.in);

		while (true) {
			String input = sc.nextLine();

			if("0".equals(input)){
				break;
			}
			
			long sum = 0;
			for (char c : input.toCharArray()) {
				sum += (c - '0');
			}
			System.out.println(sum);
		}
	}

}