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[] arg){
		Scanner sc = new Scanner(System.in);
		String line;
		line = sc.nextLine();
		int sum = 0;
		int i;

		while(line.compareTo("0") != 0){
			for(i = 0;i < line.length();i++){
				sum += Character.getNumericValue(line.charAt(i));
			}
			System.out.println(sum);
			line = sc.nextLine();
			sum = 0;
		}

	}
}
