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 {
	private static Scanner sc=new Scanner(System.in);
	public static void main(String[] args){
		while(true){
			String str=sc.nextLine();
			if(str.equals("0")) break;
			int[] ch=new int[str.length()];
			int sum=0;
			for(int i=0;i<str.length();i++){
				ch[i]=Character.getNumericValue(str.charAt(i));
				sum=sum+ch[i];
			}
			System.out.println(sum);
		}
	}
}