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[] arg){
    String input;
 
    Scanner in = new Scanner(System.in);

    while(true){
        input = in.nextLine();

        if(input.equals("0")) break;

        int tmp=0;
        for(int i=0; i<input.length(); ++i){
            
            char ch = input.charAt(i);
            tmp += Character.getNumericValue(ch);

        }
        System.out.println(tmp);
    }

  }
}