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[])	
    {	
        String str;	
        Scanner sc = new Scanner(System.in);	
        while(true){	
            str=sc.nextLine();	
            if(str.equals("0")) break;	
            int sum = 0;	
            for(int i=0;i<str.length();i++){	
                 sum+=str.charAt(i)-'0';	
            }	
            System.out.println(sum);	
        }	
    }	
}	
	
