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 str = sc.nextLine();
      if (str.equals("0")) break;
      int sum = 0;
      for (int i = 0; i < str.length(); i++) {
        sum += Character.getNumericValue(str.charAt(i));
      }
      System.out.println(sum);
    }
  }
}
