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;

class Main{
	public static void main(String[] args) 	{
		Scanner sc = new Scanner(System.in);
		while(0 < 1){
			int sum = 0;
			String str = sc.next();
			if(str.length() == 1 && str.charAt(0) == '0') break;
			for(int i = 0;i < str.length();i++) {
				sum += str.charAt(i) - '0';
			}
			System.out.printf("%d\n",sum);
			}
		sc.close();
	}	
}
