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); 

		StringBuffer line = new StringBuffer(sc.nextLine());
		for (; !line.toString().equals("0");) {
			int sum = 0;
			for (int i = 0; i < line.length(); i++) {
				char ch = line.charAt(i);
				sum += ch - '0';
			}
			System.out.println(sum);
			
			line = new StringBuffer(sc.nextLine());
		}
		
		sc.close();
	}
}