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 scan = new Scanner(System.in);
		int sum, cal;
		String x;
		
		do {
			
			x = scan.nextLine();
					
			if(x.equals("0"))break;
			sum = 0;
			
			for(int i = 0; i < x.length(); i++) {
				char c = x.charAt(i);
				cal = Integer.parseInt("" + c);
				sum += cal;
			}
			
			System.out.println(sum);
			
		}while(true);
	}
}

