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(true){
			 String x=sc.nextLine();
			 if(x.equals("0"))break;
			 int sum=0;
			 for (char y:x.toCharArray()) {
				 sum +=Integer.parseInt(String.valueOf(y));
			 }

		 System.out.println(sum);
		 }
		 sc.close();
	 }
}

