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 s = new Scanner(System.in);
		
		while(true){
			int sum = 0;
			String S = s.nextLine();
			
			if(S.charAt(0) == '0') break;
			
			for(int i = 0;i < S.length(); i++){
				sum += Integer.parseInt("" + S.charAt(i));
			}	
			System.out.println(sum);
		}
	}
}
