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 tmp = sc.next();
			if(tmp.equals("0")) break;
			int sum = 0;
			char[] c = tmp.toCharArray();
			for(int i = 0; i < c.length; i++){
				sum += c[i]-'0';
			}
			System.out.println(sum);
		}
	}
}