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