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=new Scanner(System.in);
	for(;;) {
		String i=scan.next();
		if(i.equals("0")) {
			break;
		}
		int a=0;
		for(int j=0;j<i.length();j++) {
			char ch=(i.charAt(j));
			String str=""+ch;
			a+=Integer.valueOf(str);
		}
		System.out.println(a);
	}
	}
}
