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 cin=new Scanner(System.in);
		
		while(true) {
			String str=cin.nextLine();
			
			int sum=0;
			
			for(int i=0;i<str.length();i++) {
				char c=str.charAt(i);
				if(i==0 && c=='0')return;
				sum+=(int)(c-48);
			}
			
			System.out.println(sum);
		}
	}
	
}
