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 s = sc.next();
           if(s.equals("0"))
             break;
           int answer = 0;
           for(int i=0; i< s.length(); i++){
               answer += Character.digit(s.charAt(i), 10);
           }  
           System.out.println(answer);

       }
    }
}
