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);

		while (true)
		{
			String num = sc.next();
			if (num.equals("0"))
			{
				return;
			}

			int sum = 0;
			for (int i = 0; i < num.length(); i++)
			{
				sum += (num.charAt(i) - '0');
			}

			System.out.println(sum);
		}
	}
}
