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(true){
      String input = sc.next();
      int output = 0;
      if(input.equals("0")){
        break;
      }
      for(int i = 0; i < input.length(); i++){
        char c = input.charAt(i);
        output += Character.getNumericValue(c);
      }
      System.out.println(output);
    }
  }
}
