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) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner scan = new Scanner(System.in);
		
		while(true) {
			String x = scan.nextLine();
			if(x.equals("0")) break;
			
			int count = 0;
			
			for(int i = 0; i < x.length(); i++) {
				int temp = Character.getNumericValue(x.charAt(i));
				count += temp;
			}
			
			System.out.println(count);
		}
		
	}

}

