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 sc = new Scanner(System.in);
			while(sc.hasNext()) {
				String x = sc.nextLine();
				if(x.equals("0")) {
					break;
				}
				String strA ="";
				int Sum = 0;
				for(int i = 0; i < x.length(); i++) {
					strA = x.substring(i,i+1);
					Sum += Integer.parseInt(strA);
				}
				System.out.println(Sum);
			}
	}
}