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 Scanner sc;
	public static void main(String[] args){
		sc = new Scanner(System.in);
		while(true){
			String num = sc.nextLine();
			if(num.equals("0"))break;
			int ans=0;
			for(int i=0;i<num.length();i++){
				ans+=Integer.parseInt(""+num.charAt(i));
			}
			System.out.println(ans);
		}
	}

}