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);
        String str;
        int sum;
        
        while(true){
            sum=0;
            str = sc.next();
            for(int i=0;i<str.length();i++){
                sum += str.charAt(i)-'0';
            }
            if(sum==0) break;
            System.out.println(sum);
        } 
    }
}