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.util.Arrays;

class Main{
	public static void main(String[] args){
		Scanner scanner = new Scanner(System.in);
		
		while(true){
			String s = scanner.next();
			int sum = 0;

			for(int i = 0; i < s.length(); i++){
				char ch = s.charAt(i);
				sum += Character.getNumericValue(ch);
			}
			
			if(sum == 0){
			    break;
			}

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