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 input = sc.nextLine();
			
			if(input.equals("0")) {break;}
			int sum = 0;
			for(int i=0; i<input.length(); i++) {
				sum += input.charAt(i) - 48;	//0は文字コードで48
			}
			
			System.out.println(sum);
		}
	}

}

