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 scan = null;
		try{
			scan = new Scanner(System.in);
			String str ;
			while(!(str = scan.next()).equals("0")){
				int sum = 0;
				for(int i = 0 ; i< str.length();i++){
					sum += Integer.parseInt(str.substring(i,i + 1));
				}
				System.out.println(sum);
			}
		}finally{
			if(scan !=null)scan.close();
		}
	}
}