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;
import java.lang.*;
public class Main
{
	public static void main(String args[])
	{
		Scanner input = new Scanner(System.in);
		int sum;
		String s;
		while (true)
		{
			s = input.nextLine();
			if(s.length() == 1 && s.charAt(0) == '0')
				break;
			else
			{
				sum = 0;
				for(int i = 0; i < s.length(); i++)
				{
					sum += (int)(s.charAt(i)-'0');
				}
				System.out.println(sum);
			}
		}
	}
}