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) {
        	String str = sc.next();
        	int sum = 0;

        	if(str.equals("0")) {
        		break;
        	}

        	for(int i = 0; i < str.length(); i++) {
        		sum += Integer.parseInt(str.substring(i, i+1));
        	}

        	System.out.println(sum);
        }
    }
}
