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) {
		try(Scanner sc = new Scanner(System.in)){
			while(sc.hasNext()) {
				String str = sc.nextLine();

				if(str.equals("0")) break;

				int sum = 0;
				for(int i = 0; i < str.length(); i++) {
					sum += Integer.parseInt(str.substring(i, i + 1));
				}
				System.out.println(sum);
			}
		}
	}
}

