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.*;
class Main {
	public static void main (String[] args) throws java.lang.Exception {
		Scanner sc = new Scanner(System.in);
		while(true) {
			String s = sc.next();
			if(s.equals("0")) break;
			int ret = 0;
			for(int i = 0; i < s.length(); i++) ret += s.charAt(i) - 48;
			System.out.println(ret);
		}
	}
}