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 x = sc.next();
			int ans = 0;
			if(x.equals("0")){
				break;
			}else{
				for(int i=0; i<x.length(); i++){
					ans += Integer.parseInt(String.valueOf(x.charAt(i)));
				}
			}
			System.out.println(ans);
		}
	}
}

