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;

class Main{
    
    public static void main(String[] args){
        
        Scanner sc =new Scanner(System.in);
        
        int sum=0;
        
        while(true) {
        	
         String s=sc.next();
         if(s.equals("0")) break;
        
         for(int i = 0; i < s.length(); i++) 
			sum+=s.charAt(i)-'0';
		 
         System.out.println(sum);
        
         sum=0;
        }
    }
}
