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()){
			int count=0;
			String[] s=sc.next().split("");

			int[] a=new int[s.length];
			for(int i=0; i<s.length; i++){
			a[i]=Integer.parseInt(s[i]);
			count+=a[i];
			}
			if(a[0]!=0){

			System.out.println(count);
			}
		}

	}

}
