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 in = new Scanner(System.in);
	String str;
	long num;
	int sum=0;
	char c;

	while(true){
	    str = in.next();
	    if(str.equals("0"))break;
	    sum=0;
	    for(int i=0;i<str.length();i++){
		c = str.charAt(i);
		sum+=Character.getNumericValue(c);
	    }
	    System.out.println(sum);
	}
    }
}

