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 scanner = new Scanner(System.in);
		
		for(;;)
		{
			String in = scanner.next();
			if(in.equals("0"))
			{
				break;
			}
			
			int sum = 0;
			for(int i=0; i<in.length(); i++)
			{
				char c = in.charAt(i);
				sum += c - '0';
			}
			
			System.out.println(sum+"");
		}
	}
}