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;

class Main{
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		StringBuilder str = new StringBuilder();
		
		while(true){
			String number = scan.next();
			if(number.equals("0")) break;
			int sum = 0;
			for(int i = 0 ; i < number.length() ; i++){
				sum += Integer.parseInt("" + number.charAt(i));
			}
			str.append(sum + "\n");
		}
		
		System.out.print(str);
	}
}