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);
        while(true){
        	String T=sc.nextLine();
            if(T.equals("0")) break;
        	int sum=0;
            for(int i=0;i<T.length();i++){                
                sum+=Character.getNumericValue(T.charAt(i));
            }
            System.out.println(sum);
        }
        sc.close();
    }
}
