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.*;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String a="0";
		while(true){
			String num=sc.next();
			if(num.equals(a)){
				break;
			}else{
				int sum=0;
				for(int i=0;i<num.length();i++){
					int k=num.charAt(i)-a.charAt(0);
					sum+=k;
				}
				System.out.println(sum);
			}
		}
	}
}