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) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] num;
		int sum;
		
		do {
			sum = 0;
			num = br.readLine().split("");
			
			for (String str : num) sum += Integer.valueOf(str);
			
			if (sum == 0) break;
			
			System.out.println(sum);

		} while (true);
		
	}
}