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.io.*;

public class Main {
	public static void main(String[] args) {
		BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
		try {
			String line;
			while ((line = reader.readLine()) != null) {
				if (line.equals("0"))
					break;
				int sum = 0;
				for (int i = 0; i < line.length(); i++) {
					sum += line.charAt(i) - '0';
				}
				System.out.println(sum);
			}
		} catch (IOException e) {
		}
	}
}