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){
            char[] c = sc.nextLine().toCharArray();
            if(c[0] == '0') break;
            int sum = c[0];
            for(int i = 1,l = c.length;i < l;++i) sum += c[i];
            System.out.println(sum - '0' * c.length);
        }

    }

}