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){
        int sum=0,i=0,j;
        String t;
        Scanner s = new Scanner(System.in);
        while(true){
            t = s.next();
            if(t.charAt(0) =='0'&&t.length()==1)break;
            for(i=0;i<t.length();i++){
                sum+=t.charAt(i)-'0';
            }
            System.out.println(sum);
            sum = 0;
        }
    }
}
